253242045 has 80 divisors (see below), whose sum is σ = 529689600. Its totient is φ = 115704288.

The previous prime is 253242043. The next prime is 253242061. The reversal of 253242045 is 540242352.

It is a happy number.

It is not a de Polignac number, because 253242045 - 2¹ = 253242043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253242043) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 138004 + ... + 139826.

It is an arithmetic number, because the mean of its divisors is an integer number (6621120).

Almost surely, 2^253242045 is an apocalyptic number.

It is an amenable number.

253242045 is an abundant number, since it is smaller than the sum of its proper divisors (276447555).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253242045 is an equidigital number, since it uses as much as digits as its factorization.

253242045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1838 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 253242045 is about 15913.5805210518. The cubic root of 253242045 is about 632.6719847682.

Adding to 253242045 its reverse (540242352), we get a palindrome (793484397).

The spelling of 253242045 in words is "two hundred fifty-three million, two hundred forty-two thousand, forty-five".