25645442 has 16 divisors (see below), whose sum is σ = 39151392. Its totient is φ = 12597120.

The previous prime is 25645429. The next prime is 25645447. The reversal of 25645442 is 24454652.

It is a junction number, because it is equal to n+sod(n) for n = 25645399 and 25645408.

It is not an unprimeable number, because it can be changed into a prime (25645447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31217 + ... + 32027.

It is an arithmetic number, because the mean of its divisors is an integer number (2446962).

Almost surely, 2^25645442 is an apocalyptic number.

25645442 is a deficient number, since it is larger than the sum of its proper divisors (13505950).

25645442 is a wasteful number, since it uses less digits than its factorization.

25645442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073.

The product of its digits is 38400, while the sum is 32.

The square root of 25645442 is about 5064.1328971503. The cubic root of 25645442 is about 294.8968019764.

The spelling of 25645442 in words is "twenty-five million, six hundred forty-five thousand, four hundred forty-two".