1306842331 has 4 divisors (see below), whose sum is σ = 1342162432. Its totient is φ = 1271522232.

The previous prime is 1306842247. The next prime is 1306842347. The reversal of 1306842331 is 1332486031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1306842331 - 2⁷ = 1306842203 is a prime.

It is a super-2 number, since 2×1306842331² = 3415673756187027122, 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 = 1306842293 and 1306842302.

It is not an unprimeable number, because it can be changed into a prime (1306842371) 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, 17659995 + ... + 17660068.

It is an arithmetic number, because the mean of its divisors is an integer number (335540608).

Almost surely, 2^1306842331 is an apocalyptic number.

1306842331 is a deficient number, since it is larger than the sum of its proper divisors (35320101).

1306842331 is an equidigital number, since it uses as much as digits as its factorization.

1306842331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35320100.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1306842331 is about 36150.2742866496. The cubic root of 1306842331 is about 1093.3043209901.

The spelling of 1306842331 in words is "one billion, three hundred six million, eight hundred forty-two thousand, three hundred thirty-one".