25057405 has 8 divisors (see below), whose sum is σ = 31837752. Its totient is φ = 18866688.

The previous prime is 25057387. The next prime is 25057423. The reversal of 25057405 is 50475052.

It is an interprime number because it is at equal distance from previous prime (25057387) and next prime (25057423).

It can be written as a sum of positive squares in 4 ways, for example, as 3583449 + 21473956 = 1893^2 + 4634^2 .

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 25057405 - 2⁹ = 25056893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147312 + ... + 147481.

It is an arithmetic number, because the mean of its divisors is an integer number (3979719).

Almost surely, 2^25057405 is an apocalyptic number.

It is an amenable number.

25057405 is a deficient number, since it is larger than the sum of its proper divisors (6780347).

25057405 is a wasteful number, since it uses less digits than its factorization.

25057405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294815.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 25057405 is about 5005.7372084439. The cubic root of 25057405 is about 292.6254070573.

The spelling of 25057405 in words is "twenty-five million, fifty-seven thousand, four hundred five".