25641473 has 12 divisors (see below), whose sum is σ = 30354324. Its totient is φ = 21516000.

The previous prime is 25641463. The next prime is 25641479. The reversal of 25641473 is 37414652.

It can be written as a sum of positive squares in 2 ways, for example, as 12623809 + 13017664 = 3553^2 + 3608^2 .

It is not a de Polignac number, because 25641473 - 2¹⁶ = 25575937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25641479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6578 + ... + 9723.

It is an arithmetic number, because the mean of its divisors is an integer number (2529527).

Almost surely, 2^25641473 is an apocalyptic number.

It is an amenable number.

25641473 is a deficient number, since it is larger than the sum of its proper divisors (4712851).

25641473 is a wasteful number, since it uses less digits than its factorization.

25641473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16336 (or 16325 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 25641473 is about 5063.7410083850. The cubic root of 25641473 is about 294.8815880215.

The spelling of 25641473 in words is "twenty-five million, six hundred forty-one thousand, four hundred seventy-three".