25020871 has 4 divisors (see below), whose sum is σ = 25041544. Its totient is φ = 25000200.

The previous prime is 25020811. The next prime is 25020887. The reversal of 25020871 is 17802052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25020871 - 2¹³ = 25012679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25020811) 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, 8400 + ... + 10981.

It is an arithmetic number, because the mean of its divisors is an integer number (6260386).

Almost surely, 2^25020871 is an apocalyptic number.

25020871 is a deficient number, since it is larger than the sum of its proper divisors (20673).

25020871 is a wasteful number, since it uses less digits than its factorization.

25020871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20672.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 25020871 is about 5002.0866645831. The cubic root of 25020871 is about 292.4831207539.

The spelling of 25020871 in words is "twenty-five million, twenty thousand, eight hundred seventy-one".