1361855 has 12 divisors (see below), whose sum is σ = 1797096. Its totient is φ = 990000.

The previous prime is 1361849. The next prime is 1361879. The reversal of 1361855 is 5581631.

It is not a de Polignac number, because 1361855 - 2⁴ = 1361839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (149758).

2^1361855 is an apocalyptic number.

1361855 is a deficient number, since it is larger than the sum of its proper divisors (435241).

1361855 is a wasteful number, since it uses less digits than its factorization.

1361855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278 (or 2267 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 1361855 is about 1166.9854326426. The cubic root of 1361855 is about 110.8435151229.

It can be divided in two parts, 136 and 1855, that added together give a palindrome (1991).

The spelling of 1361855 in words is "one million, three hundred sixty-one thousand, eight hundred fifty-five".