1345261 has 4 divisors (see below), whose sum is σ = 1424412. Its totient is φ = 1266112.

The previous prime is 1345243. The next prime is 1345271. The reversal of 1345261 is 1625431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1625431 = 19 ⋅85549.

It can be written as a sum of positive squares in 2 ways, for example, as 1142761 + 202500 = 1069^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345261 - 2⁵ = 1345229 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345231) 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, 39550 + ... + 39583.

It is an arithmetic number, because the mean of its divisors is an integer number (356103).

2^1345261 is an apocalyptic number.

It is an amenable number.

1345261 is a deficient number, since it is larger than the sum of its proper divisors (79151).

1345261 is an equidigital number, since it uses as much as digits as its factorization.

1345261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79150.

The product of its digits is 720, while the sum is 22.

The square root of 1345261 is about 1159.8538701061. The cubic root of 1345261 is about 110.3914701892.

The spelling of 1345261 in words is "one million, three hundred forty-five thousand, two hundred sixty-one".