1310243421 has 4 divisors (see below), whose sum is σ = 1746991232. Its totient is φ = 873495612.

The previous prime is 1310243381. The next prime is 1310243453. The reversal of 1310243421 is 1243420131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1243420131 = 3 ⋅414473377.

It is not a de Polignac number, because 1310243421 - 2²² = 1306049117 is a prime.

It is a super-3 number, since 3×1310243421³ (a number of 28 digits) contains 333 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 (1310245421) 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, 218373901 + ... + 218373906.

It is an arithmetic number, because the mean of its divisors is an integer number (436747808).

Almost surely, 2^1310243421 is an apocalyptic number.

It is an amenable number.

1310243421 is a deficient number, since it is larger than the sum of its proper divisors (436747811).

1310243421 is an equidigital number, since it uses as much as digits as its factorization.

1310243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436747810.

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

The square root of 1310243421 is about 36197.2847186084. The cubic root of 1310243421 is about 1094.2519500434.

Adding to 1310243421 its reverse (1243420131), we get a palindrome (2553663552).

The spelling of 1310243421 in words is "one billion, three hundred ten million, two hundred forty-three thousand, four hundred twenty-one".