25136881 has 16 divisors (see below), whose sum is σ = 32423040. Its totient is φ = 18910080.

The previous prime is 25136879. The next prime is 25136887. The reversal of 25136881 is 18863152.

It is not a de Polignac number, because 25136881 - 2¹ = 25136879 is a prime.

It is a super-2 number, since 2×25136881² = 1263725572816322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25136887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3396 + ... + 7861.

It is an arithmetic number, because the mean of its divisors is an integer number (2026440).

Almost surely, 2^25136881 is an apocalyptic number.

It is an amenable number.

25136881 is a deficient number, since it is larger than the sum of its proper divisors (7286159).

25136881 is a wasteful number, since it uses less digits than its factorization.

25136881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304.

The product of its digits is 11520, while the sum is 34.

The square root of 25136881 is about 5013.6694147101. The cubic root of 25136881 is about 292.9344594365.

The spelling of 25136881 in words is "twenty-five million, one hundred thirty-six thousand, eight hundred eighty-one".