25310961 has 45 divisors (see below), whose sum is σ = 41916699. Its totient is φ = 15213744.

The previous prime is 25310959. The next prime is 25310963. The reversal of 25310961 is 16901352.

The square root of 25310961 is 5031.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (25310959) and next prime (25310963).

It can be written as a sum of positive squares in only one way, i.e., 3744225 + 21566736 = 1935^2 + 4644^2 .

It is not a de Polignac number, because 25310961 - 2¹ = 25310959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25310963) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 588606 + ... + 588648.

Almost surely, 2^25310961 is an apocalyptic number.

25310961 is the 5031-st square number.

25310961 is the 2516-th centered octagonal number.

It is an amenable number.

25310961 is a deficient number, since it is larger than the sum of its proper divisors (16605738).

25310961 is an equidigital number, since it uses as much as digits as its factorization.

25310961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The cubic root of 25310961 is about 293.6091223682.

The spelling of 25310961 in words is "twenty-five million, three hundred ten thousand, nine hundred sixty-one".