1345813459 has 4 divisors (see below), whose sum is σ = 1346562520. Its totient is φ = 1345064400.

The previous prime is 1345813439. The next prime is 1345813477. The reversal of 1345813459 is 9543185431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9543185431 = 13 ⋅734091187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345813459 is a prime.

It is a super-2 number, since 2×1345813459² = 3622427732851089362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345813409) 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, 371829 + ... + 375430.

It is an arithmetic number, because the mean of its divisors is an integer number (336640630).

Almost surely, 2^1345813459 is an apocalyptic number.

1345813459 is a deficient number, since it is larger than the sum of its proper divisors (749061).

1345813459 is an equidigital number, since it uses as much as digits as its factorization.

1345813459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749060.

The product of its digits is 259200, while the sum is 43.

The square root of 1345813459 is about 36685.3302970002. The cubic root of 1345813459 is about 1104.0657962759.

The spelling of 1345813459 in words is "one billion, three hundred forty-five million, eight hundred thirteen thousand, four hundred fifty-nine".