253620242 has 6 divisors (see below), whose sum is σ = 380464149. Its totient is φ = 126798860.

The previous prime is 253620239. The next prime is 253620247. The reversal of 253620242 is 242026352.

253620242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 150577441 + 103042801 = 12271^2 + 10151^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11261.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253620247) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16892 + ... + 28152.

Almost surely, 2^253620242 is an apocalyptic number.

253620242 is a deficient number, since it is larger than the sum of its proper divisors (126843907).

253620242 is an frugal number, since it uses more digits than its factorization.

253620242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22524 (or 11263 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 253620242 is about 15925.4589258834. The cubic root of 253620242 is about 632.9867766671.

Adding to 253620242 its reverse (242026352), we get a palindrome (495646594).

The spelling of 253620242 in words is "two hundred fifty-three million, six hundred twenty thousand, two hundred forty-two".