1240931 has 2 divisors, whose sum is σ = 1240932. Its totient is φ = 1240930.

The previous prime is 1240861. The next prime is 1240957. The reversal of 1240931 is 1390421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1390421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240931 is a prime.

It is a super-2 number, since 2×1240931² = 3079819493522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1240991) 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, 620465 + 620466.

It is an arithmetic number, because the mean of its divisors is an integer number (620466).

2^1240931 is an apocalyptic number.

1240931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240931 is an equidigital number, since it uses as much as digits as its factorization.

1240931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1240931 is about 1113.9708254708. The cubic root of 1240931 is about 107.4605876795.

It can be divided in two parts, 1240 and 931, that multiplied together give a triangular number (1154440 = T₁₅₁₉).

The spelling of 1240931 in words is "one million, two hundred forty thousand, nine hundred thirty-one".