25561236 has 24 divisors (see below), whose sum is σ = 61567744. Its totient is φ = 8245440.

The previous prime is 25561231. The next prime is 25561241. The reversal of 25561236 is 63216552.

It is an interprime number because it is at equal distance from previous prime (25561231) and next prime (25561241).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561231) 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, 33985 + ... + 34728.

Almost surely, 2^25561236 is an apocalyptic number.

It is an amenable number.

25561236 is an abundant number, since it is smaller than the sum of its proper divisors (36006508).

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

25561236 is a wasteful number, since it uses less digits than its factorization.

25561236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68751 (or 68749 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 25561236 is about 5055.8121009389. The cubic root of 25561236 is about 294.5736866220.

Adding to 25561236 its reverse (63216552), we get a palindrome (88777788).

The spelling of 25561236 in words is "twenty-five million, five hundred sixty-one thousand, two hundred thirty-six".