1321626852 has 288 divisors, whose sum is σ = 4586400000. Its totient is φ = 310542336.

The previous prime is 1321626847. The next prime is 1321626857. The reversal of 1321626852 is 2586261231.

1321626852 is a `hidden beast` number, since 1 + 3 + 21 + 626 + 8 + 5 + 2 = 666.

1321626852 is nontrivially palindromic in base 16.

1321626852 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1321626847) and next prime (1321626857).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1321626857) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1057524 + ... + 1058772.

It is an arithmetic number, because the mean of its divisors is an integer number (15925000).

Almost surely, 2^1321626852 is an apocalyptic number.

1321626852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321626852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2293200000).

1321626852 is an abundant number, since it is smaller than the sum of its proper divisors (3264773148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321626852 is a wasteful number, since it uses less digits than its factorization.

1321626852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1310 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1321626852 is about 36354.1861688582. The cubic root of 1321626852 is about 1097.4117804498.

The spelling of 1321626852 in words is "one billion, three hundred twenty-one million, six hundred twenty-six thousand, eight hundred fifty-two".