1345445 has 4 divisors (see below), whose sum is σ = 1614540. Its totient is φ = 1076352.

The previous prime is 1345441. The next prime is 1345451. The reversal of 1345445 is 5445431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 829921 + 515524 = 911^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345445 - 2² = 1345441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345441) 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, 134540 + ... + 134549.

It is an arithmetic number, because the mean of its divisors is an integer number (403635).

2^1345445 is an apocalyptic number.

It is an amenable number.

1345445 is a deficient number, since it is larger than the sum of its proper divisors (269095).

1345445 is an equidigital number, since it uses as much as digits as its factorization.

1345445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269094.

The product of its digits is 4800, while the sum is 26.

The square root of 1345445 is about 1159.9331877311. The cubic root of 1345445 is about 110.3965029436.

The spelling of 1345445 in words is "one million, three hundred forty-five thousand, four hundred forty-five".