1240615631 has 2 divisors, whose sum is σ = 1240615632. Its totient is φ = 1240615630.

The previous prime is 1240615627. The next prime is 1240615633. The reversal of 1240615631 is 1365160421.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1365160421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240615631 - 2² = 1240615627 is a prime.

It is a super-2 number, since 2×1240615631² = 3078254287763056322, which contains 22 as substring.

Together with 1240615633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240615594 and 1240615603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240615633) 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 as a sum of consecutive naturals, namely, 620307815 + 620307816.

It is an arithmetic number, because the mean of its divisors is an integer number (620307816).

Almost surely, 2^1240615631 is an apocalyptic number.

1240615631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240615631 is an equidigital number, since it uses as much as digits as its factorization.

1240615631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1240615631 is about 35222.3740114150. The cubic root of 1240615631 is about 1074.5148359835.

The spelling of 1240615631 in words is "one billion, two hundred forty million, six hundred fifteen thousand, six hundred thirty-one".