1321052520 has 64 divisors (see below), whose sum is σ = 4171752000. Its totient is φ = 333739008.

The previous prime is 1321052519. The next prime is 1321052521. The reversal of 1321052520 is 252501231.

It is an interprime number because it is at equal distance from previous prime (1321052519) and next prime (1321052521).

It is not an unprimeable number, because it can be changed into a prime (1321052521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287425 + ... + 291984.

It is an arithmetic number, because the mean of its divisors is an integer number (65183625).

Almost surely, 2^1321052520 is an apocalyptic number.

1321052520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321052520 is an abundant number, since it is smaller than the sum of its proper divisors (2850699480).

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

1321052520 is a wasteful number, since it uses less digits than its factorization.

1321052520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579442 (or 579438 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1321052520 is about 36346.2861926772. The cubic root of 1321052520 is about 1097.2527920478.

Adding to 1321052520 its reverse (252501231), we get a palindrome (1573553751).

The spelling of 1321052520 in words is "one billion, three hundred twenty-one million, fifty-two thousand, five hundred twenty".