1361205 has 20 divisors (see below), whose sum is σ = 2440812. Its totient is φ = 725760.

The previous prime is 1361197. The next prime is 1361273. The reversal of 1361205 is 5021631.

It can be written as a sum of positive squares in 2 ways, for example, as 762129 + 599076 = 873^2 + 774^2 .

It is not a de Polignac number, because 1361205 - 2³ = 1361197 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1276 + ... + 2085.

2^1361205 is an apocalyptic number.

1361205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361205 is a deficient number, since it is larger than the sum of its proper divisors (1079607).

1361205 is an equidigital number, since it uses as much as digits as its factorization.

1361205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378 (or 3369 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1361205 is about 1166.7069040680. The cubic root of 1361205 is about 110.8258774766.

Adding to 1361205 its reverse (5021631), we get a palindrome (6382836).

The spelling of 1361205 in words is "one million, three hundred sixty-one thousand, two hundred five".