25523121 has 8 divisors (see below), whose sum is σ = 36648640. Its totient is φ = 15706512.

The previous prime is 25523119. The next prime is 25523131. The reversal of 25523121 is 12132552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25523121 - 2¹ = 25523119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25523101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327181 + ... + 327258.

It is an arithmetic number, because the mean of its divisors is an integer number (4581080).

Almost surely, 2^25523121 is an apocalyptic number.

It is an amenable number.

25523121 is a deficient number, since it is larger than the sum of its proper divisors (11125519).

25523121 is a wasteful number, since it uses less digits than its factorization.

25523121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654455.

The product of its digits is 600, while the sum is 21.

The square root of 25523121 is about 5052.0412706153. The cubic root of 25523121 is about 294.4271983834.

Adding to 25523121 its reverse (12132552), we get a palindrome (37655673).

The spelling of 25523121 in words is "twenty-five million, five hundred twenty-three thousand, one hundred twenty-one".