25661022 has 16 divisors (see below), whose sum is σ = 51650832. Its totient is φ = 8498880.

The previous prime is 25661021. The next prime is 25661029. The reversal of 25661022 is 22016652.

It is a junction number, because it is equal to n+sod(n) for n = 25660983 and 25661001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25661021) 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, 12679 + ... + 14562.

It is an arithmetic number, because the mean of its divisors is an integer number (3228177).

Almost surely, 2^25661022 is an apocalyptic number.

25661022 is an abundant number, since it is smaller than the sum of its proper divisors (25989810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25661022 is a wasteful number, since it uses less digits than its factorization.

25661022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27403.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 25661022 is about 5065.6709328578. The cubic root of 25661022 is about 294.9565079998.

Adding to 25661022 its reverse (22016652), we get a palindrome (47677674).

The spelling of 25661022 in words is "twenty-five million, six hundred sixty-one thousand, twenty-two".