1311463421 has 4 divisors (see below), whose sum is σ = 1311968700. Its totient is φ = 1310958144.

The previous prime is 1311463397. The next prime is 1311463451. The reversal of 1311463421 is 1243641131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243641131 = 53 ⋅23464927.

It can be written as a sum of positive squares in 2 ways, for example, as 850888900 + 460574521 = 29170^2 + 21461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311463421 - 2⁶ = 1311463357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311463451) 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, 248726 + ... + 253943.

It is an arithmetic number, because the mean of its divisors is an integer number (327992175).

Almost surely, 2^1311463421 is an apocalyptic number.

It is an amenable number.

1311463421 is a deficient number, since it is larger than the sum of its proper divisors (505279).

1311463421 is an equidigital number, since it uses as much as digits as its factorization.

1311463421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505278.

The product of its digits is 1728, while the sum is 26.

The square root of 1311463421 is about 36214.1328903510. The cubic root of 1311463421 is about 1094.5914730220.

The spelling of 1311463421 in words is "one billion, three hundred eleven million, four hundred sixty-three thousand, four hundred twenty-one".