1240303131 has 16 divisors (see below), whose sum is σ = 1840537600. Its totient is φ = 825495624.

The previous prime is 1240303093. The next prime is 1240303139. The reversal of 1240303131 is 1313030421.

It is not a de Polignac number, because 1240303131 - 2⁶ = 1240303067 is a prime.

It is a super-2 number, since 2×1240303131² = 3076703713536806322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240303139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21451 + ... + 54228.

It is an arithmetic number, because the mean of its divisors is an integer number (115033600).

Almost surely, 2^1240303131 is an apocalyptic number.

1240303131 is a deficient number, since it is larger than the sum of its proper divisors (600234469).

1240303131 is an equidigital number, since it uses as much as digits as its factorization.

1240303131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76295 (or 76289 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1240303131 is about 35217.9376312697. The cubic root of 1240303131 is about 1074.4246081763.

Adding to 1240303131 its reverse (1313030421), we get a palindrome (2553333552).

The spelling of 1240303131 in words is "one billion, two hundred forty million, three hundred three thousand, one hundred thirty-one".