25725641 has 4 divisors (see below), whose sum is σ = 27238932. Its totient is φ = 24212352.

The previous prime is 25725611. The next prime is 25725647. The reversal of 25725641 is 14652752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23232400 + 2493241 = 4820^2 + 1579^2 .

It is not a de Polignac number, because 25725641 - 2¹⁰ = 25724617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25725598 and 25725607.

It is not an unprimeable number, because it can be changed into a prime (25725647) 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, 756620 + ... + 756653.

It is an arithmetic number, because the mean of its divisors is an integer number (6809733).

Almost surely, 2^25725641 is an apocalyptic number.

It is an amenable number.

25725641 is a deficient number, since it is larger than the sum of its proper divisors (1513291).

25725641 is a wasteful number, since it uses less digits than its factorization.

25725641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513290.

The product of its digits is 16800, while the sum is 32.

The square root of 25725641 is about 5072.0450510618. The cubic root of 25725641 is about 295.2038847189.

The spelling of 25725641 in words is "twenty-five million, seven hundred twenty-five thousand, six hundred forty-one".