1365641 has 4 divisors (see below), whose sum is σ = 1378512. Its totient is φ = 1352772.

The previous prime is 1365583. The next prime is 1365659. The reversal of 1365641 is 1465631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1465631 = 29 ⋅50539.

It is a cyclic number.

It is not a de Polignac number, because 1365641 - 2⁶ = 1365577 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 1365641.

It is not an unprimeable number, because it can be changed into a prime (1335641) 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, 6275 + ... + 6488.

It is an arithmetic number, because the mean of its divisors is an integer number (344628).

2^1365641 is an apocalyptic number.

It is an amenable number.

1365641 is a deficient number, since it is larger than the sum of its proper divisors (12871).

1365641 is a wasteful number, since it uses less digits than its factorization.

1365641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12870.

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

The square root of 1365641 is about 1168.6064350328. The cubic root of 1365641 is about 110.9461362449.

The spelling of 1365641 in words is "one million, three hundred sixty-five thousand, six hundred forty-one".