1345012161 has 4 divisors (see below), whose sum is σ = 1793349552. Its totient is φ = 896674772.

The previous prime is 1345012153. The next prime is 1345012177. The reversal of 1345012161 is 1612105431.

It is a happy number.

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 1345012161 - 2³ = 1345012153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1345012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224168691 + ... + 224168696.

It is an arithmetic number, because the mean of its divisors is an integer number (448337388).

Almost surely, 2^1345012161 is an apocalyptic number.

It is an amenable number.

1345012161 is a deficient number, since it is larger than the sum of its proper divisors (448337391).

1345012161 is an equidigital number, since it uses as much as digits as its factorization.

1345012161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448337390.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1345012161 is about 36674.4074389758. The cubic root of 1345012161 is about 1103.8466323328.

Adding to 1345012161 its reverse (1612105431), we get a palindrome (2957117592).

The spelling of 1345012161 in words is "one billion, three hundred forty-five million, twelve thousand, one hundred sixty-one".