25514521 has 4 divisors (see below), whose sum is σ = 26623872. Its totient is φ = 24405172.

The previous prime is 25514513. The next prime is 25514527. The reversal of 25514521 is 12541552.

25514521 = T₁₄₇₈ + T₁₄₇₉ + ... + T₁₅₀₀.

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 25514521 - 2³ = 25514513 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (25514527) 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, 554641 + ... + 554686.

It is an arithmetic number, because the mean of its divisors is an integer number (6655968).

Almost surely, 2^25514521 is an apocalyptic number.

It is an amenable number.

25514521 is a deficient number, since it is larger than the sum of its proper divisors (1109351).

25514521 is a wasteful number, since it uses less digits than its factorization.

25514521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109350.

The product of its digits is 2000, while the sum is 25.

The square root of 25514521 is about 5051.1900577983. The cubic root of 25514521 is about 294.3941256471.

The spelling of 25514521 in words is "twenty-five million, five hundred fourteen thousand, five hundred twenty-one".