1240051931 has 4 divisors (see below), whose sum is σ = 1268890392. Its totient is φ = 1211213472.

The previous prime is 1240051913. The next prime is 1240051957. The reversal of 1240051931 is 1391500421.

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

It is a cyclic number.

It is not a de Polignac number, because 1240051931 - 2⁶ = 1240051867 is a prime.

It is a super-2 number, since 2×1240051931² = 3075457583153657522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240051931.

It is not an unprimeable number, because it can be changed into a prime (1240051331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14419166 + ... + 14419251.

It is an arithmetic number, because the mean of its divisors is an integer number (317222598).

Almost surely, 2^1240051931 is an apocalyptic number.

1240051931 is a deficient number, since it is larger than the sum of its proper divisors (28838461).

1240051931 is an equidigital number, since it uses as much as digits as its factorization.

1240051931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28838460.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1240051931 is about 35214.3710862483. The cubic root of 1240051931 is about 1074.3520684674.

The spelling of 1240051931 in words is "one billion, two hundred forty million, fifty-one thousand, nine hundred thirty-one".