25430837 has 2 divisors, whose sum is σ = 25430838. Its totient is φ = 25430836.

The previous prime is 25430833. The next prime is 25430849. The reversal of 25430837 is 73803452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21585316 + 3845521 = 4646^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 25430837 - 2² = 25430833 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25430833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715418 + 12715419.

It is an arithmetic number, because the mean of its divisors is an integer number (12715419).

Almost surely, 2^25430837 is an apocalyptic number.

It is an amenable number.

25430837 is a deficient number, since it is larger than the sum of its proper divisors (1).

25430837 is an equidigital number, since it uses as much as digits as its factorization.

25430837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 25430837 is about 5042.8996619009. The cubic root of 25430837 is about 294.0719161691.

The spelling of 25430837 in words is "twenty-five million, four hundred thirty thousand, eight hundred thirty-seven".