1072865831 has 4 divisors (see below), whose sum is σ = 1073499000. Its totient is φ = 1072232664.

The previous prime is 1072865821. The next prime is 1072865861. The reversal of 1072865831 is 1385682701.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1072865831 is a prime.

It is a super-2 number, since 2×1072865831² = 2302082182654641122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072865821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314036 + ... + 317433.

It is an arithmetic number, because the mean of its divisors is an integer number (268374750).

Almost surely, 2^1072865831 is an apocalyptic number.

1072865831 is a deficient number, since it is larger than the sum of its proper divisors (633169).

1072865831 is an equidigital number, since it uses as much as digits as its factorization.

1072865831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633168.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1072865831 is about 32754.6306802565. The cubic root of 1072865831 is about 1023.7214535621.

The spelling of 1072865831 in words is "one billion, seventy-two million, eight hundred sixty-five thousand, eight hundred thirty-one".