1315742399 has 4 divisors (see below), whose sum is σ = 1323621264. Its totient is φ = 1307863536.

The previous prime is 1315742371. The next prime is 1315742401. The reversal of 1315742399 is 9932475131.

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 1315742399 - 2⁸ = 1315742143 is a prime.

It is a super-3 number, since 3×1315742399³ (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 (1315742359) 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, 3939182 + ... + 3939515.

It is an arithmetic number, because the mean of its divisors is an integer number (330905316).

Almost surely, 2^1315742399 is an apocalyptic number.

1315742399 is a deficient number, since it is larger than the sum of its proper divisors (7878865).

1315742399 is an equidigital number, since it uses as much as digits as its factorization.

1315742399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878864.

The product of its digits is 204120, while the sum is 44.

The square root of 1315742399 is about 36273.1636199546. The cubic root of 1315742399 is about 1095.7806402835.

The spelling of 1315742399 in words is "one billion, three hundred fifteen million, seven hundred forty-two thousand, three hundred ninety-nine".