25408481 has 4 divisors (see below), whose sum is σ = 29038272. Its totient is φ = 21778692.

The previous prime is 25408463. The next prime is 25408483. The reversal of 25408481 is 18480452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25408481 - 2¹⁴ = 25392097 is a prime.

It is a super-2 number, since 2×25408481² = 1291181813454722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25408483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814885 + ... + 1814898.

It is an arithmetic number, because the mean of its divisors is an integer number (7259568).

Almost surely, 2^25408481 is an apocalyptic number.

It is an amenable number.

25408481 is a deficient number, since it is larger than the sum of its proper divisors (3629791).

25408481 is an equidigital number, since it uses as much as digits as its factorization.

25408481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629790.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 25408481 is about 5040.6825926654. The cubic root of 25408481 is about 293.9857189910.

The spelling of 25408481 in words is "twenty-five million, four hundred eight thousand, four hundred eighty-one".