25401233 has 16 divisors (see below), whose sum is σ = 31416000. Its totient is φ = 20191680.

The previous prime is 25401227. The next prime is 25401253. The reversal of 25401233 is 33210452.

It is a happy number.

It is not a de Polignac number, because 25401233 - 2⁴ = 25401217 is a prime.

It is a super-4 number, since 4×25401233⁴ (a number of 31 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25401253) 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, 1958 + ... + 7391.

It is an arithmetic number, because the mean of its divisors is an integer number (1963500).

Almost surely, 2^25401233 is an apocalyptic number.

It is an amenable number.

25401233 is a deficient number, since it is larger than the sum of its proper divisors (6014767).

25401233 is a wasteful number, since it uses less digits than its factorization.

25401233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9392.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 25401233 is about 5039.9635911383. The cubic root of 25401233 is about 293.9577623003.

Adding to 25401233 its reverse (33210452), we get a palindrome (58611685).

It can be divided in two parts, 2540 and 1233, that added together give a palindrome (3773).

The spelling of 25401233 in words is "twenty-five million, four hundred one thousand, two hundred thirty-three".