1240242331 has 4 divisors (see below), whose sum is σ = 1273762432. Its totient is φ = 1206722232.

The previous prime is 1240242329. The next prime is 1240242343. The reversal of 1240242331 is 1332420421.

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 1240242331 - 2¹ = 1240242329 is a prime.

It is a super-2 number, since 2×1240242331² = 3076402079208627122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240242131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16759995 + ... + 16760068.

It is an arithmetic number, because the mean of its divisors is an integer number (318440608).

Almost surely, 2^1240242331 is an apocalyptic number.

1240242331 is a deficient number, since it is larger than the sum of its proper divisors (33520101).

1240242331 is an equidigital number, since it uses as much as digits as its factorization.

1240242331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33520100.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1240242331 is about 35217.0744242051. The cubic root of 1240242331 is about 1074.4070516930.

Adding to 1240242331 its reverse (1332420421), we get a palindrome (2572662752).

The spelling of 1240242331 in words is "one billion, two hundred forty million, two hundred forty-two thousand, three hundred thirty-one".