25013621 has 8 divisors (see below), whose sum is σ = 25900800. Its totient is φ = 24131520.

The previous prime is 25013617. The next prime is 25013623. The reversal of 25013621 is 12631052.

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

It is a cyclic number.

It is not a de Polignac number, because 25013621 - 2² = 25013617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25013593 and 25013602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25013623) 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 7 ways as a sum of consecutive naturals, for example, 10685 + ... + 12813.

It is an arithmetic number, because the mean of its divisors is an integer number (3237600).

Almost surely, 2^25013621 is an apocalyptic number.

It is an amenable number.

25013621 is a deficient number, since it is larger than the sum of its proper divisors (887179).

25013621 is a wasteful number, since it uses less digits than its factorization.

25013621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 25013621 is about 5001.3619145189. The cubic root of 25013621 is about 292.4548682406.

Adding to 25013621 its reverse (12631052), we get a palindrome (37644673).

The spelling of 25013621 in words is "twenty-five million, thirteen thousand, six hundred twenty-one".