25671545 has 16 divisors (see below), whose sum is σ = 31767312. Its totient is φ = 19906560.

The previous prime is 25671539. The next prime is 25671551. The reversal of 25671545 is 54517652.

It is an interprime number because it is at equal distance from previous prime (25671539) and next prime (25671551).

It can be written as a sum of positive squares in 8 ways, for example, as 861184 + 24810361 = 928^2 + 4981^2 .

It is not a de Polignac number, because 25671545 - 2¹⁸ = 25409401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21689 + ... + 22841.

It is an arithmetic number, because the mean of its divisors is an integer number (1985457).

Almost surely, 2^25671545 is an apocalyptic number.

It is an amenable number.

25671545 is a deficient number, since it is larger than the sum of its proper divisors (6095767).

25671545 is a wasteful number, since it uses less digits than its factorization.

25671545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292.

The product of its digits is 42000, while the sum is 35.

The square root of 25671545 is about 5066.7094844682. The cubic root of 25671545 is about 294.9968208027.

The spelling of 25671545 in words is "twenty-five million, six hundred seventy-one thousand, five hundred forty-five".