1321052502 has 64 divisors (see below), whose sum is σ = 3299917824. Its totient is φ = 342519840.

The previous prime is 1321052489. The next prime is 1321052519. The reversal of 1321052502 is 2052501231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294843 + ... + 299289.

It is an arithmetic number, because the mean of its divisors is an integer number (51561216).

Almost surely, 2^1321052502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321052502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649958912).

1321052502 is an abundant number, since it is smaller than the sum of its proper divisors (1978865322).

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

1321052502 is a wasteful number, since it uses less digits than its factorization.

1321052502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113.

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

The square root of 1321052502 is about 36346.2859450591. The cubic root of 1321052502 is about 1097.2527870643.

Adding to 1321052502 its reverse (2052501231), we get a palindrome (3373553733).

The spelling of 1321052502 in words is "one billion, three hundred twenty-one million, fifty-two thousand, five hundred two".