25073521 has 16 divisors (see below), whose sum is σ = 30490560. Its totient is φ = 20321280.

The previous prime is 25073479. The next prime is 25073527. The reversal of 25073521 is 12537052.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25073521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25073527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25 + ... + 7081.

It is an arithmetic number, because the mean of its divisors is an integer number (1905660).

Almost surely, 2^25073521 is an apocalyptic number.

It is an amenable number.

25073521 is a deficient number, since it is larger than the sum of its proper divisors (5417039).

25073521 is a wasteful number, since it uses less digits than its factorization.

25073521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 25073521 is about 5007.3467025961. The cubic root of 25073521 is about 292.6881289071.

The spelling of 25073521 in words is "twenty-five million, seventy-three thousand, five hundred twenty-one".