25425731 has 8 divisors (see below), whose sum is σ = 26058240. Its totient is φ = 24797128.

The previous prime is 25425713. The next prime is 25425767. The reversal of 25425731 is 13752452.

It is a happy number.

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 25425731 - 2¹⁴ = 25409347 is a prime.

It is a super-2 number, since 2×25425731² = 1292935593768722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25425694 and 25425703.

It is not an unprimeable number, because it can be changed into a prime (25425131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15530 + ... + 17088.

It is an arithmetic number, because the mean of its divisors is an integer number (3257280).

Almost surely, 2^25425731 is an apocalyptic number.

25425731 is a deficient number, since it is larger than the sum of its proper divisors (632509).

25425731 is a wasteful number, since it uses less digits than its factorization.

25425731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its digits is 8400, while the sum is 29.

The square root of 25425731 is about 5042.3933801321. The cubic root of 25425731 is about 294.0522336120.

The spelling of 25425731 in words is "twenty-five million, four hundred twenty-five thousand, seven hundred thirty-one".