253025405 has 4 divisors (see below), whose sum is σ = 303630492. Its totient is φ = 202420320.

The previous prime is 253025363. The next prime is 253025429. The reversal of 253025405 is 504520352.

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 119530489 + 133494916 = 10933^2 + 11554^2 .

It is not a de Polignac number, because 253025405 - 2¹⁶ = 252959869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25302536 + ... + 25302545.

It is an arithmetic number, because the mean of its divisors is an integer number (75907623).

Almost surely, 2^253025405 is an apocalyptic number.

It is an amenable number.

253025405 is a deficient number, since it is larger than the sum of its proper divisors (50605087).

253025405 is an equidigital number, since it uses as much as digits as its factorization.

253025405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50605086.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 253025405 is about 15906.7722998728. The cubic root of 253025405 is about 632.4915234742.

Adding to 253025405 its reverse (504520352), we get a palindrome (757545757).

The spelling of 253025405 in words is "two hundred fifty-three million, twenty-five thousand, four hundred five".