1025400965 has 4 divisors (see below), whose sum is σ = 1230481164. Its totient is φ = 820320768.

The previous prime is 1025400953. The next prime is 1025400967. The reversal of 1025400965 is 5690045201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5690045201 = 12281 ⋅463321.

It can be written as a sum of positive squares in 2 ways, for example, as 312617761 + 712783204 = 17681^2 + 26698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025400965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025400967) 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, 102540092 + ... + 102540101.

It is an arithmetic number, because the mean of its divisors is an integer number (307620291).

Almost surely, 2^1025400965 is an apocalyptic number.

It is an amenable number.

1025400965 is a deficient number, since it is larger than the sum of its proper divisors (205080199).

1025400965 is an equidigital number, since it uses as much as digits as its factorization.

1025400965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205080198.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1025400965 is about 32021.8825961248. The cubic root of 1025400965 is about 1008.3962932858.

The spelling of 1025400965 in words is "one billion, twenty-five million, four hundred thousand, nine hundred sixty-five".