25340657 has 4 divisors (see below), whose sum is σ = 25364976. Its totient is φ = 25316340.

The previous prime is 25340639. The next prime is 25340683. The reversal of 25340657 is 75604352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25340657 - 2⁸ = 25340401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25340617) 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, 10523 + ... + 12704.

It is an arithmetic number, because the mean of its divisors is an integer number (6341244).

Almost surely, 2^25340657 is an apocalyptic number.

It is an amenable number.

25340657 is a deficient number, since it is larger than the sum of its proper divisors (24319).

25340657 is a wasteful number, since it uses less digits than its factorization.

25340657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24318.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 25340657 is about 5033.9504367842. The cubic root of 25340657 is about 293.7239027970.

The spelling of 25340657 in words is "twenty-five million, three hundred forty thousand, six hundred fifty-seven".