25426401 has 32 divisors (see below), whose sum is σ = 45523968. Its totient is φ = 12191040.

The previous prime is 25426397. The next prime is 25426439. The reversal of 25426401 is 10462452.

It is not a de Polignac number, because 25426401 - 2² = 25426397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25426451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1231 + ... + 7236.

It is an arithmetic number, because the mean of its divisors is an integer number (1422624).

Almost surely, 2^25426401 is an apocalyptic number.

25426401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25426401 is a deficient number, since it is larger than the sum of its proper divisors (20097567).

25426401 is a wasteful number, since it uses less digits than its factorization.

25426401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25426401 is about 5042.4598163991. The cubic root of 25426401 is about 294.0548164714.

Adding to 25426401 its reverse (10462452), we get a palindrome (35888853).

It can be divided in two parts, 25 and 426401, that added together give a triangular number (426426 = T₉₂₃).

The spelling of 25426401 in words is "twenty-five million, four hundred twenty-six thousand, four hundred one".