25478481 has 24 divisors (see below), whose sum is σ = 39710304. Its totient is φ = 14488320.

The previous prime is 25478471. The next prime is 25478483. The reversal of 25478481 is 18487452.

It is a happy number.

It is not a de Polignac number, because 25478481 - 2⁶ = 25478417 is a prime.

It is a super-2 number, since 2×25478481² = 1298305988134722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25478483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51646 + ... + 52136.

It is an arithmetic number, because the mean of its divisors is an integer number (1654596).

Almost surely, 2^25478481 is an apocalyptic number.

25478481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25478481 is a deficient number, since it is larger than the sum of its proper divisors (14231823).

25478481 is a wasteful number, since it uses less digits than its factorization.

25478481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 854 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 25478481 is about 5047.6213209788. The cubic root of 25478481 is about 294.2554469205.

The spelling of 25478481 in words is "twenty-five million, four hundred seventy-eight thousand, four hundred eighty-one".