25427881 has 2 divisors, whose sum is σ = 25427882. Its totient is φ = 25427880.

The previous prime is 25427873. The next prime is 25427887. The reversal of 25427881 is 18872452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24601600 + 826281 = 4960^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 25427881 - 2³ = 25427873 is a prime.

It is a super-2 number, since 2×25427881² = 1293154264300322, 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 25427881.

It is not a weakly prime, because it can be changed into another prime (25427887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12713940 + 12713941.

It is an arithmetic number, because the mean of its divisors is an integer number (12713941).

Almost surely, 2^25427881 is an apocalyptic number.

It is an amenable number.

25427881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25427881 is an equidigital number, since it uses as much as digits as its factorization.

25427881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 37.

The square root of 25427881 is about 5042.6065680360. The cubic root of 25427881 is about 294.0605217314.

The spelling of 25427881 in words is "twenty-five million, four hundred twenty-seven thousand, eight hundred eighty-one".