25290481 has 4 divisors (see below), whose sum is σ = 25907364. Its totient is φ = 24673600.

The previous prime is 25290469. The next prime is 25290491. The reversal of 25290481 is 18409252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12215025 + 13075456 = 3495^2 + 3616^2 .

It is a cyclic number.

It is not a de Polignac number, because 25290481 - 2²¹ = 23193329 is a prime.

It is a super-2 number, since 2×25290481² = 1279216858422722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25290431) 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, 308380 + ... + 308461.

It is an arithmetic number, because the mean of its divisors is an integer number (6476841).

Almost surely, 2^25290481 is an apocalyptic number.

It is an amenable number.

25290481 is a deficient number, since it is larger than the sum of its proper divisors (616883).

25290481 is an equidigital number, since it uses as much as digits as its factorization.

25290481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616882.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 25290481 is about 5028.9642074686. The cubic root of 25290481 is about 293.5299111342.

The spelling of 25290481 in words is "twenty-five million, two hundred ninety thousand, four hundred eighty-one".