25124621 has 4 divisors (see below), whose sum is σ = 25316544. Its totient is φ = 24932700.

The previous prime is 25124569. The next prime is 25124633. The reversal of 25124621 is 12642152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25124621 - 2²² = 20930317 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 (25124651) 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 3 ways as a sum of consecutive naturals, for example, 95765 + ... + 96026.

It is an arithmetic number, because the mean of its divisors is an integer number (6329136).

Almost surely, 2^25124621 is an apocalyptic number.

It is an amenable number.

25124621 is a deficient number, since it is larger than the sum of its proper divisors (191923).

25124621 is a wasteful number, since it uses less digits than its factorization.

25124621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191922.

The product of its digits is 960, while the sum is 23.

The square root of 25124621 is about 5012.4466081944. The cubic root of 25124621 is about 292.8868274264.

Adding to 25124621 its reverse (12642152), we get a palindrome (37766773).

The spelling of 25124621 in words is "twenty-five million, one hundred twenty-four thousand, six hundred twenty-one".