1292257085 has 16 divisors (see below), whose sum is σ = 1772823936. Its totient is φ = 885826368.

The previous prime is 1292257067. The next prime is 1292257097. The reversal of 1292257085 is 5807522921.

It is not a de Polignac number, because 1292257085 - 2⁸ = 1292256829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191387 + ... + 198023.

It is an arithmetic number, because the mean of its divisors is an integer number (110801496).

Almost surely, 2^1292257085 is an apocalyptic number.

It is an amenable number.

1292257085 is a deficient number, since it is larger than the sum of its proper divisors (480566851).

1292257085 is an equidigital number, since it uses as much as digits as its factorization.

1292257085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 1292257085 is about 35947.9774813549. The cubic root of 1292257085 is about 1089.2217560113.

It can be divided in two parts, 12922 and 57085, that added together give a palindrome (70007).

The spelling of 1292257085 in words is "one billion, two hundred ninety-two million, two hundred fifty-seven thousand, eighty-five".