1312240431 has 8 divisors (see below), whose sum is σ = 1750322560. Its totient is φ = 874492632.

The previous prime is 1312240399. The next prime is 1312240441. The reversal of 1312240431 is 1340422131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312240431 - 2⁵ = 1312240399 is a prime.

It is a super-2 number, since 2×1312240431² = 3443949897502131522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312240398 and 1312240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312240441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74275 + ... + 90228.

It is an arithmetic number, because the mean of its divisors is an integer number (218790320).

Almost surely, 2^1312240431 is an apocalyptic number.

1312240431 is a deficient number, since it is larger than the sum of its proper divisors (438082129).

1312240431 is a wasteful number, since it uses less digits than its factorization.

1312240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167165.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1312240431 is about 36224.8592957930. The cubic root of 1312240431 is about 1094.8076032354.

Adding to 1312240431 its reverse (1340422131), we get a palindrome (2652662562).

The spelling of 1312240431 in words is "one billion, three hundred twelve million, two hundred forty thousand, four hundred thirty-one".