25128393 has 8 divisors (see below), whose sum is σ = 35268000. Its totient is φ = 15870528.

The previous prime is 25128377. The next prime is 25128421. The reversal of 25128393 is 39382152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25128393 - 2⁴ = 25128377 is a prime.

It is a super-2 number, since 2×25128393² = 1262872269524898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25128343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220368 + ... + 220481.

It is an arithmetic number, because the mean of its divisors is an integer number (4408500).

Almost surely, 2^25128393 is an apocalyptic number.

It is an amenable number.

25128393 is a deficient number, since it is larger than the sum of its proper divisors (10139607).

25128393 is a wasteful number, since it uses less digits than its factorization.

25128393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440871.

The product of its digits is 12960, while the sum is 33.

The square root of 25128393 is about 5012.8228574327. The cubic root of 25128393 is about 292.9014838841.

The spelling of 25128393 in words is "twenty-five million, one hundred twenty-eight thousand, three hundred ninety-three".