1340130431 has 4 divisors (see below), whose sum is σ = 1340991600. Its totient is φ = 1339269264.

The previous prime is 1340130427. The next prime is 1340130437. The reversal of 1340130431 is 1340310431.

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 1340130431 - 2² = 1340130427 is a prime.

It is a super-2 number, since 2×1340130431² = 3591899144184491522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340130437) 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, 428246 + ... + 431363.

It is an arithmetic number, because the mean of its divisors is an integer number (335247900).

Almost surely, 2^1340130431 is an apocalyptic number.

1340130431 is a deficient number, since it is larger than the sum of its proper divisors (861169).

1340130431 is an equidigital number, since it uses as much as digits as its factorization.

1340130431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861168.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1340130431 is about 36607.7919437925. The cubic root of 1340130431 is about 1102.5095406266.

Adding to 1340130431 its reverse (1340310431), we get a palindrome (2680440862).

The spelling of 1340130431 in words is "one billion, three hundred forty million, one hundred thirty thousand, four hundred thirty-one".