25129623 has 32 divisors (see below), whose sum is σ = 36382720. Its totient is φ = 15396480.

The previous prime is 25129607. The next prime is 25129633. The reversal of 25129623 is 32692152.

It is not a de Polignac number, because 25129623 - 2⁴ = 25129607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25129603) 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 31 ways as a sum of consecutive naturals, for example, 230493 + ... + 230601.

It is an arithmetic number, because the mean of its divisors is an integer number (1136960).

Almost surely, 2^25129623 is an apocalyptic number.

25129623 is a deficient number, since it is larger than the sum of its proper divisors (11253097).

25129623 is a wasteful number, since it uses less digits than its factorization.

25129623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247.

The product of its digits is 6480, while the sum is 30.

The square root of 25129623 is about 5012.9455412961. The cubic root of 25129623 is about 292.9062628466.

It can be divided in two parts, 25129 and 623, that added together give a palindrome (25752).

The spelling of 25129623 in words is "twenty-five million, one hundred twenty-nine thousand, six hundred twenty-three".