1345515121 has 4 divisors (see below), whose sum is σ = 1346047600. Its totient is φ = 1344982644.

The previous prime is 1345515109. The next prime is 1345515137. The reversal of 1345515121 is 1215155431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1345515121 - 2⁷ = 1345514993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345515121.

It is not an unprimeable number, because it can be changed into a prime (1345515151) 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, 262431 + ... + 267508.

It is an arithmetic number, because the mean of its divisors is an integer number (336511900).

Almost surely, 2^1345515121 is an apocalyptic number.

It is an amenable number.

1345515121 is a deficient number, since it is larger than the sum of its proper divisors (532479).

1345515121 is an equidigital number, since it uses as much as digits as its factorization.

1345515121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532478.

The product of its digits is 3000, while the sum is 28.

The square root of 1345515121 is about 36681.2638958910. The cubic root of 1345515121 is about 1103.9842076720.

The spelling of 1345515121 in words is "one billion, three hundred forty-five million, five hundred fifteen thousand, one hundred twenty-one".