860721297 has 16 divisors (see below), whose sum is σ = 1158259200. Its totient is φ = 568518912.

The previous prime is 860721289. The next prime is 860721331. The reversal of 860721297 is 792127068.

It is not a de Polignac number, because 860721297 - 2³ = 860721289 is a prime.

It is a super-2 number, since 2×860721297² = 1481682302218724418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (860721217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191328 + ... + 195774.

It is an arithmetic number, because the mean of its divisors is an integer number (72391200).

Almost surely, 2^860721297 is an apocalyptic number.

It is an amenable number.

860721297 is a deficient number, since it is larger than the sum of its proper divisors (297537903).

860721297 is a wasteful number, since it uses less digits than its factorization.

860721297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 860721297 is about 29338.0520314489. The cubic root of 860721297 is about 951.2343316461.

The spelling of 860721297 in words is "eight hundred sixty million, seven hundred twenty-one thousand, two hundred ninety-seven".