25140393 has 6 divisors (see below), whose sum is σ = 36313914. Its totient is φ = 16760256.

The previous prime is 25140389. The next prime is 25140457. The reversal of 25140393 is 39304152.

25140393 is a `hidden beast` number, since 251 + 403 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17539344 + 7601049 = 4188^2 + 2757^2 .

It is not a de Polignac number, because 25140393 - 2² = 25140389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25140383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1396680 + ... + 1396697.

It is an arithmetic number, because the mean of its divisors is an integer number (6052319).

Almost surely, 2^25140393 is an apocalyptic number.

It is an amenable number.

25140393 is a deficient number, since it is larger than the sum of its proper divisors (11173521).

25140393 is a wasteful number, since it uses less digits than its factorization.

25140393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793383 (or 2793380 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 25140393 is about 5014.0196449555. The cubic root of 25140393 is about 292.9481012498.

The spelling of 25140393 in words is "twenty-five million, one hundred forty thousand, three hundred ninety-three".