25405051 has 16 divisors (see below), whose sum is σ = 30468096. Its totient is φ = 20726496.

The previous prime is 25405049. The next prime is 25405067. The reversal of 25405051 is 15050452.

It is not a de Polignac number, because 25405051 - 2¹ = 25405049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25405091) 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, 11130 + ... + 13216.

It is an arithmetic number, because the mean of its divisors is an integer number (1904256).

Almost surely, 2^25405051 is an apocalyptic number.

25405051 is a deficient number, since it is larger than the sum of its proper divisors (5063045).

25405051 is a wasteful number, since it uses less digits than its factorization.

25405051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 25405051 is about 5040.3423494838. The cubic root of 25405051 is about 293.9724895973.

The spelling of 25405051 in words is "twenty-five million, four hundred five thousand, fifty-one".