25043281 has 2 divisors, whose sum is σ = 25043282. Its totient is φ = 25043280.

The previous prime is 25043279. The next prime is 25043287. The reversal of 25043281 is 18234052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14745600 + 10297681 = 3840^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 25043281 - 2¹ = 25043279 is a prime.

It is a super-2 number, since 2×25043281² = 1254331846489922, which contains 22 as substring.

Together with 25043279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25043287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12521640 + 12521641.

It is an arithmetic number, because the mean of its divisors is an integer number (12521641).

Almost surely, 2^25043281 is an apocalyptic number.

It is an amenable number.

25043281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25043281 is an equidigital number, since it uses as much as digits as its factorization.

25043281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 25043281 is about 5004.3262283748. The cubic root of 25043281 is about 292.5704157544.

The spelling of 25043281 in words is "twenty-five million, forty-three thousand, two hundred eighty-one".