1240663407 has 4 divisors (see below), whose sum is σ = 1654217880. Its totient is φ = 827108936.

The previous prime is 1240663363. The next prime is 1240663409. The reversal of 1240663407 is 7043660421.

It is a happy number.

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 1240663407 - 2¹⁵ = 1240630639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240663409) 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 in 3 ways as a sum of consecutive naturals, for example, 206777232 + ... + 206777237.

It is an arithmetic number, because the mean of its divisors is an integer number (413554470).

Almost surely, 2^1240663407 is an apocalyptic number.

1240663407 is a deficient number, since it is larger than the sum of its proper divisors (413554473).

1240663407 is an equidigital number, since it uses as much as digits as its factorization.

1240663407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413554472.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 1240663407 is about 35223.0522101649. The cubic root of 1240663407 is about 1074.5286289641.

The spelling of 1240663407 in words is "one billion, two hundred forty million, six hundred sixty-three thousand, four hundred seven".