25370881 has 2 divisors, whose sum is σ = 25370882. Its totient is φ = 25370880.

The previous prime is 25370879. The next prime is 25370887. The reversal of 25370881 is 18807352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 370881 = 5000^2 + 609^2 .

It is a cyclic number.

It is not a de Polignac number, because 25370881 - 2¹ = 25370879 is a prime.

It is a super-2 number, since 2×25370881² = 1287363205432322, which contains 22 as substring.

Together with 25370879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25370887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12685440 + 12685441.

It is an arithmetic number, because the mean of its divisors is an integer number (12685441).

Almost surely, 2^25370881 is an apocalyptic number.

It is an amenable number.

25370881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25370881 is an equidigital number, since it uses as much as digits as its factorization.

25370881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 25370881 is about 5036.9515582344. The cubic root of 25370881 is about 293.8406320008.

It can be divided in two parts, 25 and 370881, that multiplied together give a square (9272025 = 3045²).

The spelling of 25370881 in words is "twenty-five million, three hundred seventy thousand, eight hundred eighty-one".