1361845 has 4 divisors (see below), whose sum is σ = 1634220. Its totient is φ = 1089472.

The previous prime is 1361839. The next prime is 1361849. The reversal of 1361845 is 5481631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 736164 = 791^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361845 - 2⁵ = 1361813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361849) 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, 136180 + ... + 136189.

It is an arithmetic number, because the mean of its divisors is an integer number (408555).

2^1361845 is an apocalyptic number.

It is an amenable number.

1361845 is a deficient number, since it is larger than the sum of its proper divisors (272375).

1361845 is an equidigital number, since it uses as much as digits as its factorization.

1361845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272374.

The product of its digits is 2880, while the sum is 28.

The square root of 1361845 is about 1166.9811480911. The cubic root of 1361845 is about 110.8432438170.

The spelling of 1361845 in words is "one million, three hundred sixty-one thousand, eight hundred forty-five".