25161612 has 48 divisors (see below), whose sum is σ = 68248320. Its totient is φ = 7065792.

The previous prime is 25161611. The next prime is 25161613. The reversal of 25161612 is 21616152.

It is an interprime number because it is at equal distance from previous prime (25161611) and next prime (25161613).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25161611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2418 + ... + 7494.

It is an arithmetic number, because the mean of its divisors is an integer number (1421840).

Almost surely, 2^25161612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25161612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34124160).

25161612 is an abundant number, since it is smaller than the sum of its proper divisors (43086708).

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

25161612 is a wasteful number, since it uses less digits than its factorization.

25161612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5150 (or 5148 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 25161612 is about 5016.1351656430. The cubic root of 25161612 is about 293.0304961133.

Adding to 25161612 its reverse (21616152), we get a palindrome (46777764).

The spelling of 25161612 in words is "twenty-five million, one hundred sixty-one thousand, six hundred twelve".