1315397026 has 4 divisors (see below), whose sum is σ = 1973095542. Its totient is φ = 657698512.

The previous prime is 1315397021. The next prime is 1315397029. The reversal of 1315397026 is 6207935131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6207935131 = 193 ⋅32165467.

It can be written as a sum of positive squares in only one way, i.e., 724955625 + 590441401 = 26925^2 + 24299^2 .

It is not an unprimeable number, because it can be changed into a prime (1315397021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328849255 + ... + 328849258.

Almost surely, 2^1315397026 is an apocalyptic number.

1315397026 is a deficient number, since it is larger than the sum of its proper divisors (657698516).

1315397026 is an equidigital number, since it uses as much as digits as its factorization.

1315397026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657698515.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 1315397026 is about 36268.4025840676. The cubic root of 1315397026 is about 1095.6847536910.

The spelling of 1315397026 in words is "one billion, three hundred fifteen million, three hundred ninety-seven thousand, twenty-six".