1340012431 has 2 divisors, whose sum is σ = 1340012432. Its totient is φ = 1340012430.

The previous prime is 1340012419. The next prime is 1340012447. The reversal of 1340012431 is 1342100431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340012431 - 2¹⁷ = 1339881359 is a prime.

It is a super-2 number, since 2×1340012431² = 3591266630469059522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1340012399 and 1340012408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340013431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670006215 + 670006216.

It is an arithmetic number, because the mean of its divisors is an integer number (670006216).

Almost surely, 2^1340012431 is an apocalyptic number.

1340012431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340012431 is an equidigital number, since it uses as much as digits as its factorization.

1340012431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1340012431 is about 36606.1802295733. The cubic root of 1340012431 is about 1102.4771806062.

Adding to 1340012431 its reverse (1342100431), we get a palindrome (2682112862).

The spelling of 1340012431 in words is "one billion, three hundred forty million, twelve thousand, four hundred thirty-one".