1025425865 has 4 divisors (see below), whose sum is σ = 1230511044. Its totient is φ = 820340688.

The previous prime is 1025425847. The next prime is 1025425883. The reversal of 1025425865 is 5685245201.

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

It is an interprime number because it is at equal distance from previous prime (1025425847) and next prime (1025425883).

It can be written as a sum of positive squares in 2 ways, for example, as 394260736 + 631165129 = 19856^2 + 25123^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025425865 - 2²⁶ = 958317001 is a prime.

It is a super-2 number, since 2×1025425865² = 2102996409221996450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102542582 + ... + 102542591.

It is an arithmetic number, because the mean of its divisors is an integer number (307627761).

Almost surely, 2^1025425865 is an apocalyptic number.

It is an amenable number.

1025425865 is a deficient number, since it is larger than the sum of its proper divisors (205085179).

1025425865 is an equidigital number, since it uses as much as digits as its factorization.

1025425865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205085178.

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 1025425865 is about 32022.2713903933. The cubic root of 1025425865 is about 1008.4044555772.

The spelling of 1025425865 in words is "one billion, twenty-five million, four hundred twenty-five thousand, eight hundred sixty-five".