25399101 has 24 divisors (see below), whose sum is σ = 42428064. Its totient is φ = 13396320.

The previous prime is 25399093. The next prime is 25399103. The reversal of 25399101 is 10199352.

It is not a de Polignac number, because 25399101 - 2³ = 25399093 is a prime.

It is a super-2 number, since 2×25399101² = 1290228663216402, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25399103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4735 + ... + 8556.

It is an arithmetic number, because the mean of its divisors is an integer number (1767836).

Almost surely, 2^25399101 is an apocalyptic number.

25399101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25399101 is a deficient number, since it is larger than the sum of its proper divisors (17028963).

25399101 is a wasteful number, since it uses less digits than its factorization.

25399101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13321 (or 13314 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 25399101 is about 5039.7520772355. The cubic root of 25399101 is about 293.9495378244.

The spelling of 25399101 in words is "twenty-five million, three hundred ninety-nine thousand, one hundred one".