1365161 has 4 divisors (see below), whose sum is σ = 1560192. Its totient is φ = 1170132.

The previous prime is 1365149. The next prime is 1365163. The reversal of 1365161 is 1615631.

It is a happy number.

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 1365161 - 2⁶ = 1365097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1365163) 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, 97505 + ... + 97518.

It is an arithmetic number, because the mean of its divisors is an integer number (390048).

2^1365161 is an apocalyptic number.

It is an amenable number.

1365161 is a deficient number, since it is larger than the sum of its proper divisors (195031).

1365161 is an equidigital number, since it uses as much as digits as its factorization.

1365161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195030.

The product of its digits is 540, while the sum is 23.

The square root of 1365161 is about 1168.4010441625. The cubic root of 1365161 is about 110.9331361505.

The spelling of 1365161 in words is "one million, three hundred sixty-five thousand, one hundred sixty-one".