1313421243 has 8 divisors (see below), whose sum is σ = 1780910400. Its totient is φ = 860773128.

The previous prime is 1313421229. The next prime is 1313421253. The reversal of 1313421243 is 3421243131.

It is a happy number.

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

It is not a de Polignac number, because 1313421243 - 2¹⁶ = 1313355707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313421253) 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, 3710053 + ... + 3710406.

It is an arithmetic number, because the mean of its divisors is an integer number (222613800).

Almost surely, 2^1313421243 is an apocalyptic number.

1313421243 is a deficient number, since it is larger than the sum of its proper divisors (467489157).

1313421243 is an equidigital number, since it uses as much as digits as its factorization.

1313421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7420521.

The product of its digits is 1728, while the sum is 24.

The square root of 1313421243 is about 36241.1539965272. The cubic root of 1313421243 is about 1095.1358902264.

Adding to 1313421243 its reverse (3421243131), we get a palindrome (4734664374).

The spelling of 1313421243 in words is "one billion, three hundred thirteen million, four hundred twenty-one thousand, two hundred forty-three".