1240432313 has 4 divisors (see below), whose sum is σ = 1240750848. Its totient is φ = 1240113780.

The previous prime is 1240432243. The next prime is 1240432337. The reversal of 1240432313 is 3132340421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1240432313 - 2¹⁰ = 1240431289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240432373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153353 + ... + 161238.

It is an arithmetic number, because the mean of its divisors is an integer number (310187712).

Almost surely, 2^1240432313 is an apocalyptic number.

It is an amenable number.

1240432313 is a deficient number, since it is larger than the sum of its proper divisors (318535).

1240432313 is an equidigital number, since it uses as much as digits as its factorization.

1240432313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318534.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1240432313 is about 35219.7716204975. The cubic root of 1240432313 is about 1074.4619086012.

Adding to 1240432313 its reverse (3132340421), we get a palindrome (4372772734).

The spelling of 1240432313 in words is "one billion, two hundred forty million, four hundred thirty-two thousand, three hundred thirteen".