868021451 has 12 divisors (see below), whose sum is σ = 961088856. Its totient is φ = 783335520.

The previous prime is 868021447. The next prime is 868021457. The reversal of 868021451 is 154120868.

It is not a de Polignac number, because 868021451 - 2² = 868021447 is a prime.

It is a super-2 number, since 2×868021451² = 1506922478792290802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868021457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9605 + ... + 42758.

It is an arithmetic number, because the mean of its divisors is an integer number (80090738).

Almost surely, 2^868021451 is an apocalyptic number.

868021451 is a deficient number, since it is larger than the sum of its proper divisors (93067405).

868021451 is a wasteful number, since it uses less digits than its factorization.

868021451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52522 (or 52511 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 868021451 is about 29462.2037702545. The cubic root of 868021451 is about 953.9160425069.

The spelling of 868021451 in words is "eight hundred sixty-eight million, twenty-one thousand, four hundred fifty-one".