25492381 has 2 divisors, whose sum is σ = 25492382. Its totient is φ = 25492380.

The previous prime is 25492373. The next prime is 25492427. The reversal of 25492381 is 18329452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20848356 + 4644025 = 4566^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 25492381 - 2³ = 25492373 is a prime.

It is a super-2 number, since 2×25492381² = 1299722978098322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25492321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12746190 + 12746191.

It is an arithmetic number, because the mean of its divisors is an integer number (12746191).

Almost surely, 2^25492381 is an apocalyptic number.

It is an amenable number.

25492381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25492381 is an equidigital number, since it uses as much as digits as its factorization.

25492381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 25492381 is about 5048.9980194094. The cubic root of 25492381 is about 294.3089483719.

The spelling of 25492381 in words is "twenty-five million, four hundred ninety-two thousand, three hundred eighty-one".