25731403 has 2 divisors, whose sum is σ = 25731404. Its totient is φ = 25731402.

The previous prime is 25731397. The next prime is 25731437. The reversal of 25731403 is 30413752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25731403 - 2⁵ = 25731371 is a prime.

It is not a weakly prime, because it can be changed into another prime (25731463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12865701 + 12865702.

It is an arithmetic number, because the mean of its divisors is an integer number (12865702).

Almost surely, 2^25731403 is an apocalyptic number.

25731403 is a deficient number, since it is larger than the sum of its proper divisors (1).

25731403 is an equidigital number, since it uses as much as digits as its factorization.

25731403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 25731403 is about 5072.6130347189. The cubic root of 25731403 is about 295.2259228844.

The spelling of 25731403 in words is "twenty-five million, seven hundred thirty-one thousand, four hundred three".