25625881 has 2 divisors, whose sum is σ = 25625882. Its totient is φ = 25625880.

The previous prime is 25625863. The next prime is 25625903. The reversal of 25625881 is 18852652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25593481 + 32400 = 5059^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 25625881 - 2⁷ = 25625753 is a prime.

It is a super-2 number, since 2×25625881² = 1313371554052322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25625881.

It is not a weakly prime, because it can be changed into another prime (25625081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12812940 + 12812941.

It is an arithmetic number, because the mean of its divisors is an integer number (12812941).

Almost surely, 2^25625881 is an apocalyptic number.

It is an amenable number.

25625881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25625881 is an equidigital number, since it uses as much as digits as its factorization.

25625881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 37.

The square root of 25625881 is about 5062.2012010587. The cubic root of 25625881 is about 294.8218056269.

The spelling of 25625881 in words is "twenty-five million, six hundred twenty-five thousand, eight hundred eighty-one".