1240516313 has 8 divisors (see below), whose sum is σ = 1264256136. Its totient is φ = 1216886400.

The previous prime is 1240516307. The next prime is 1240516349. The reversal of 1240516313 is 3136150421.

It can be written as a sum of positive squares in 4 ways, for example, as 4853209 + 1235663104 = 2203^2 + 35152^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1240516313 - 2⁴ = 1240516297 is a prime.

It is a super-2 number, since 2×1240516313² = 3077761445638227938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1240518313) 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, 4508 + ... + 50013.

It is an arithmetic number, because the mean of its divisors is an integer number (158032017).

Almost surely, 2^1240516313 is an apocalyptic number.

It is an amenable number.

1240516313 is a deficient number, since it is larger than the sum of its proper divisors (23739823).

1240516313 is an equidigital number, since it uses as much as digits as its factorization.

1240516313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54955.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1240516313 is about 35220.9641123011. The cubic root of 1240516313 is about 1074.4861616411.

Adding to 1240516313 its reverse (3136150421), we get a palindrome (4376666734).

The spelling of 1240516313 in words is "one billion, two hundred forty million, five hundred sixteen thousand, three hundred thirteen".