25240123 has 4 divisors (see below), whose sum is σ = 25476120. Its totient is φ = 25004128.

The previous prime is 25240109. The next prime is 25240139. The reversal of 25240123 is 32104252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25240123 - 2⁵ = 25240091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25240123.

It is not an unprimeable number, because it can be changed into a prime (25240823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117838 + ... + 118051.

It is an arithmetic number, because the mean of its divisors is an integer number (6369030).

Almost surely, 2^25240123 is an apocalyptic number.

25240123 is a deficient number, since it is larger than the sum of its proper divisors (235997).

25240123 is a wasteful number, since it uses less digits than its factorization.

25240123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235996.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 25240123 is about 5023.9549161990. The cubic root of 25240123 is about 293.3349576643.

Adding to 25240123 its reverse (32104252), we get a palindrome (57344375).

The spelling of 25240123 in words is "twenty-five million, two hundred forty thousand, one hundred twenty-three".