321252261 has 32 divisors (see below), whose sum is σ = 480936960. Its totient is φ = 189052800.

The previous prime is 321252257. The next prime is 321252317. The reversal of 321252261 is 162252123.

It is not a de Polignac number, because 321252261 - 2² = 321252257 is a prime.

It is a super-2 number, since 2×321252261² = 206406030395224242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321252221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382480 + ... + 383318.

It is an arithmetic number, because the mean of its divisors is an integer number (15029280).

Almost surely, 2^321252261 is an apocalyptic number.

It is an amenable number.

321252261 is a deficient number, since it is larger than the sum of its proper divisors (159684699).

321252261 is a wasteful number, since it uses less digits than its factorization.

321252261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177.

The product of its digits is 1440, while the sum is 24.

The square root of 321252261 is about 17923.5114026242. The cubic root of 321252261 is about 684.8814407558.

The spelling of 321252261 in words is "three hundred twenty-one million, two hundred fifty-two thousand, two hundred sixty-one".