1313430421 has 8 divisors (see below), whose sum is σ = 1391978520. Its totient is φ = 1235025408.

The previous prime is 1313430397. The next prime is 1313430431. The reversal of 1313430421 is 1240343131.

It can be written as a sum of positive squares in 4 ways, for example, as 225420196 + 1088010225 = 15014^2 + 32985^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1313430421 - 2⁵ = 1313430389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313430392 and 1313430401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313430431) 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, 16566 + ... + 53863.

It is an arithmetic number, because the mean of its divisors is an integer number (173997315).

Almost surely, 2^1313430421 is an apocalyptic number.

It is an amenable number.

1313430421 is a deficient number, since it is larger than the sum of its proper divisors (78548099).

1313430421 is a wasteful number, since it uses less digits than its factorization.

1313430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71543.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1313430421 is about 36241.2806203092. The cubic root of 1313430421 is about 1095.1384411049.

Adding to 1313430421 its reverse (1240343131), we get a palindrome (2553773552).

The spelling of 1313430421 in words is "one billion, three hundred thirteen million, four hundred thirty thousand, four hundred twenty-one".