1240413321613 has 4 divisors (see below), whose sum is σ = 1240416383580. Its totient is φ = 1240410259648.

The previous prime is 1240413321601. The next prime is 1240413321617. The reversal of 1240413321613 is 3161233140421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 898728648169 + 341684673444 = 948013^2 + 584538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240413321613 - 2²¹ = 1240411224461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240413321617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810220 + ... + 1771237.

It is an arithmetic number, because the mean of its divisors is an integer number (310104095895).

Almost surely, 2^{1240413321613} is an apocalyptic number.

It is an amenable number.

1240413321613 is a deficient number, since it is larger than the sum of its proper divisors (3061967).

1240413321613 is an equidigital number, since it uses as much as digits as its factorization.

1240413321613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061966.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 1240413321613 in words is "one trillion, two hundred forty billion, four hundred thirteen million, three hundred twenty-one thousand, six hundred thirteen".