1240245253 has 32 divisors (see below), whose sum is σ = 1396362240. Its totient is φ = 1094446080.

The previous prime is 1240245211. The next prime is 1240245257. The reversal of 1240245253 is 3525420421.

It is a de Polignac number, because none of the positive numbers 2^k-1240245253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240245257) 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 31 ways as a sum of consecutive naturals, for example, 5322825 + ... + 5323057.

It is an arithmetic number, because the mean of its divisors is an integer number (43636320).

Almost surely, 2^1240245253 is an apocalyptic number.

1240245253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1240245253 is a deficient number, since it is larger than the sum of its proper divisors (156116987).

1240245253 is a wasteful number, since it uses less digits than its factorization.

1240245253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1240245253 is about 35217.1159097391. The cubic root of 1240245253 is about 1074.4078954568.

Adding to 1240245253 its reverse (3525420421), we get a palindrome (4765665674).

The spelling of 1240245253 in words is "one billion, two hundred forty million, two hundred forty-five thousand, two hundred fifty-three".