1025639975 has 12 divisors (see below), whose sum is σ = 1272564384. Its totient is φ = 820014720.

The previous prime is 1025639959. The next prime is 1025639977. The reversal of 1025639975 is 5799365201.

It is not a de Polignac number, because 1025639975 - 2⁴ = 1025639959 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025639977) 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 11 ways as a sum of consecutive naturals, for example, 32882 + ... + 55968.

It is an arithmetic number, because the mean of its divisors is an integer number (106047032).

Almost surely, 2^1025639975 is an apocalyptic number.

1025639975 is a deficient number, since it is larger than the sum of its proper divisors (246924409).

1025639975 is a wasteful number, since it uses less digits than its factorization.

1025639975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24874 (or 24869 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 1025639975 is about 32025.6143578855. The cubic root of 1025639975 is about 1008.4746359968.

The spelling of 1025639975 in words is "one billion, twenty-five million, six hundred thirty-nine thousand, nine hundred seventy-five".