25436731 has 2 divisors, whose sum is σ = 25436732. Its totient is φ = 25436730.

The previous prime is 25436717. The next prime is 25436759. The reversal of 25436731 is 13763452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25436731 - 2⁷ = 25436603 is a prime.

It is a super-2 number, since 2×25436731² = 1294054567932722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25436693 and 25436702.

It is not a weakly prime, because it can be changed into another prime (25436701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12718365 + 12718366.

It is an arithmetic number, because the mean of its divisors is an integer number (12718366).

Almost surely, 2^25436731 is an apocalyptic number.

25436731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25436731 is an equidigital number, since it uses as much as digits as its factorization.

25436731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 25436731 is about 5043.4840140522. The cubic root of 25436731 is about 294.0946330251.

The spelling of 25436731 in words is "twenty-five million, four hundred thirty-six thousand, seven hundred thirty-one".