1240533131 has 2 divisors, whose sum is σ = 1240533132. Its totient is φ = 1240533130.

The previous prime is 1240533127. The next prime is 1240533137. The reversal of 1240533131 is 1313350421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240533131 - 2² = 1240533127 is a prime.

It is a super-2 number, since 2×1240533131² = 3077844898217326322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240533097 and 1240533106.

It is not a weakly prime, because it can be changed into another prime (1240533137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620266565 + 620266566.

It is an arithmetic number, because the mean of its divisors is an integer number (620266566).

Almost surely, 2^1240533131 is an apocalyptic number.

1240533131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240533131 is an equidigital number, since it uses as much as digits as its factorization.

1240533131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1240533131 is about 35221.2028613448. The cubic root of 1240533131 is about 1074.4910173146.

Adding to 1240533131 its reverse (1313350421), we get a palindrome (2553883552).

The spelling of 1240533131 in words is "one billion, two hundred forty million, five hundred thirty-three thousand, one hundred thirty-one".