25085381 has 2 divisors, whose sum is σ = 25085382. Its totient is φ = 25085380.

The previous prime is 25085329. The next prime is 25085393. The reversal of 25085381 is 18358052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15880225 + 9205156 = 3985^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 25085381 - 2¹⁴ = 25068997 is a prime.

It is a super-2 number, since 2×25085381² = 1258552679830322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25085311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12542690 + 12542691.

It is an arithmetic number, because the mean of its divisors is an integer number (12542691).

Almost surely, 2^25085381 is an apocalyptic number.

It is an amenable number.

25085381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25085381 is an equidigital number, since it uses as much as digits as its factorization.

25085381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 25085381 is about 5008.5308225067. The cubic root of 25085381 is about 292.7342696684.

The spelling of 25085381 in words is "twenty-five million, eighty-five thousand, three hundred eighty-one".