253502421 has 8 divisors (see below), whose sum is σ = 338156064. Its totient is φ = 168925200.

The previous prime is 253502413. The next prime is 253502437. The reversal of 253502421 is 124205352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253502421 - 2³ = 253502413 is a prime.

It is a super-2 number, since 2×253502421² = 128526954905722482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 253502391 and 253502400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253502441) 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, 10855 + ... + 24996.

It is an arithmetic number, because the mean of its divisors is an integer number (42269508).

Almost surely, 2^253502421 is an apocalyptic number.

It is an amenable number.

253502421 is a deficient number, since it is larger than the sum of its proper divisors (84653643).

253502421 is a wasteful number, since it uses less digits than its factorization.

253502421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38211.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 253502421 is about 15921.7593563023. The cubic root of 253502421 is about 632.8887420543. Note that the first 3 decimals are identical.

Adding to 253502421 its reverse (124205352), we get a palindrome (377707773).

The spelling of 253502421 in words is "two hundred fifty-three million, five hundred two thousand, four hundred twenty-one".