25140621 has 16 divisors (see below), whose sum is σ = 36820800. Its totient is φ = 15131520.

The previous prime is 25140607. The next prime is 25140641. The reversal of 25140621 is 12604152.

It is not a de Polignac number, because 25140621 - 2⁵ = 25140589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140641) 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 15 ways as a sum of consecutive naturals, for example, 2361 + ... + 7473.

It is an arithmetic number, because the mean of its divisors is an integer number (2301300).

Almost surely, 2^25140621 is an apocalyptic number.

It is an amenable number.

25140621 is a deficient number, since it is larger than the sum of its proper divisors (11680179).

25140621 is a wasteful number, since it uses less digits than its factorization.

25140621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 25140621 is about 5014.0423811532. The cubic root of 25140621 is about 292.9489868361.

Adding to 25140621 its reverse (12604152), we get a palindrome (37744773).

The spelling of 25140621 in words is "twenty-five million, one hundred forty thousand, six hundred twenty-one".