1361641 has 4 divisors (see below), whose sum is σ = 1382032. Its totient is φ = 1341252.

The previous prime is 1361629. The next prime is 1361677. The reversal of 1361641 is 1461631.

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 1361641 - 2⁵ = 1361609 is a prime.

It is a Duffinian number.

1361641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1361441) 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, 10095 + ... + 10228.

It is an arithmetic number, because the mean of its divisors is an integer number (345508).

2^1361641 is an apocalyptic number.

It is an amenable number.

1361641 is a deficient number, since it is larger than the sum of its proper divisors (20391).

1361641 is an equidigital number, since it uses as much as digits as its factorization.

1361641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20390.

The product of its digits is 432, while the sum is 22.

The square root of 1361641 is about 1166.8937398067. The cubic root of 1361641 is about 110.8377088869.

It can be divided in two parts, 1361 and 641, that added together give a palindrome (2002).

The spelling of 1361641 in words is "one million, three hundred sixty-one thousand, six hundred forty-one".