25485381 has 8 divisors (see below), whose sum is σ = 37756160. Its totient is φ = 16990236.

The previous prime is 25485371. The next prime is 25485391. The reversal of 25485381 is 18358452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25485371) and next prime (25485391).

It is not a de Polignac number, because 25485381 - 2⁹ = 25484869 is a prime.

It is a super-2 number, since 2×25485381² = 1299009289430322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25485301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471925 + ... + 471978.

It is an arithmetic number, because the mean of its divisors is an integer number (4719520).

Almost surely, 2^25485381 is an apocalyptic number.

It is an amenable number.

25485381 is a deficient number, since it is larger than the sum of its proper divisors (12270779).

25485381 is an equidigital number, since it uses as much as digits as its factorization.

25485381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943912 (or 943906 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 25485381 is about 5048.3047649681. The cubic root of 25485381 is about 294.2820076265.

The spelling of 25485381 in words is "twenty-five million, four hundred eighty-five thousand, three hundred eighty-one".