25042397 has 4 divisors (see below), whose sum is σ = 25072476. Its totient is φ = 25012320.

The previous prime is 25042351. The next prime is 25042403. The reversal of 25042397 is 79324052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11062276 + 13980121 = 3326^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 25042397 - 2²⁰ = 23993821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25042097) 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 3 ways as a sum of consecutive naturals, for example, 13754 + ... + 15467.

It is an arithmetic number, because the mean of its divisors is an integer number (6268119).

Almost surely, 2^25042397 is an apocalyptic number.

It is an amenable number.

25042397 is a deficient number, since it is larger than the sum of its proper divisors (30079).

25042397 is an equidigital number, since it uses as much as digits as its factorization.

25042397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30078.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 25042397 is about 5004.2379040170. The cubic root of 25042397 is about 292.5669732437.

The spelling of 25042397 in words is "twenty-five million, forty-two thousand, three hundred ninety-seven".