1240885613 has 12 divisors (see below), whose sum is σ = 1400817180. Its totient is φ = 1097585280.

The previous prime is 1240885601. The next prime is 1240885637. The reversal of 1240885613 is 3165880421.

It can be written as a sum of positive squares in 2 ways, for example, as 896523364 + 344362249 = 29942^2 + 18557^2 .

It is not a de Polignac number, because 1240885613 - 2⁶ = 1240885549 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 (1240885643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134108 + ... + 143061.

It is an arithmetic number, because the mean of its divisors is an integer number (116734765).

Almost surely, 2^1240885613 is an apocalyptic number.

It is an amenable number.

1240885613 is a deficient number, since it is larger than the sum of its proper divisors (159931567).

1240885613 is a wasteful number, since it uses less digits than its factorization.

1240885613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277228 (or 277217 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1240885613 is about 35226.2063384634. The cubic root of 1240885613 is about 1074.5927754129.

The spelling of 1240885613 in words is "one billion, two hundred forty million, eight hundred eighty-five thousand, six hundred thirteen".