1345121 has 4 divisors (see below), whose sum is σ = 1388544. Its totient is φ = 1301700.

The previous prime is 1345117. The next prime is 1345129. The reversal of 1345121 is 1215431.

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 1345121 - 2² = 1345117 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 1345121.

It is not an unprimeable number, because it can be changed into a prime (1345129) 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, 21665 + ... + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (347136).

2^1345121 is an apocalyptic number.

It is an amenable number.

1345121 is a deficient number, since it is larger than the sum of its proper divisors (43423).

1345121 is an equidigital number, since it uses as much as digits as its factorization.

1345121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43422.

The product of its digits is 120, while the sum is 17.

The square root of 1345121 is about 1159.7935161053. The cubic root of 1345121 is about 110.3876406121.

The spelling of 1345121 in words is "one million, three hundred forty-five thousand, one hundred twenty-one".