1345661 has 8 divisors (see below), whose sum is σ = 1439424. Its totient is φ = 1254880.

The previous prime is 1345651. The next prime is 1345667. The reversal of 1345661 is 1665431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1345661 - 2¹⁴ = 1329277 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 1345661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2^1345661 is an apocalyptic number.

It is an amenable number.

1345661 is a deficient number, since it is larger than the sum of its proper divisors (93763).

1345661 is a wasteful number, since it uses less digits than its factorization.

1345661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its digits is 2160, while the sum is 26.

The square root of 1345661 is about 1160.0262928055. The cubic root of 1345661 is about 110.4024103741.

The spelling of 1345661 in words is "one million, three hundred forty-five thousand, six hundred sixty-one".