1345797815 has 4 divisors (see below), whose sum is σ = 1614957384. Its totient is φ = 1076638248.

The previous prime is 1345797787. The next prime is 1345797833. The reversal of 1345797815 is 5187975431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5187975431 = 113 ⋅45911287.

It is a cyclic number.

It is not a de Polignac number, because 1345797815 - 2¹⁶ = 1345732279 is a prime.

It is a super-2 number, since 2×1345797815² = 3622343517717548450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134579777 + ... + 134579786.

It is an arithmetic number, because the mean of its divisors is an integer number (403739346).

Almost surely, 2^1345797815 is an apocalyptic number.

1345797815 is a deficient number, since it is larger than the sum of its proper divisors (269159569).

1345797815 is an equidigital number, since it uses as much as digits as its factorization.

1345797815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269159568.

The product of its digits is 1058400, while the sum is 50.

The square root of 1345797815 is about 36685.1170776379. The cubic root of 1345797815 is about 1104.0615183001.

The spelling of 1345797815 in words is "one billion, three hundred forty-five million, seven hundred ninety-seven thousand, eight hundred fifteen".