25420571 has 8 divisors (see below), whose sum is σ = 28112304. Its totient is φ = 22792320.

The previous prime is 25420531. The next prime is 25420579. The reversal of 25420571 is 17502452.

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 25420571 - 2¹⁴ = 25404187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25420571.

It is not an unprimeable number, because it can be changed into a prime (25420579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15026 + ... + 16631.

It is an arithmetic number, because the mean of its divisors is an integer number (3514038).

Almost surely, 2^25420571 is an apocalyptic number.

25420571 is a deficient number, since it is larger than the sum of its proper divisors (2691733).

25420571 is a wasteful number, since it uses less digits than its factorization.

25420571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31741.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 25420571 is about 5041.8816923843. The cubic root of 25420571 is about 294.0323402189.

The spelling of 25420571 in words is "twenty-five million, four hundred twenty thousand, five hundred seventy-one".