1363861 has 4 divisors (see below), whose sum is σ = 1366924. Its totient is φ = 1360800.

The previous prime is 1363847. The next prime is 1363867. The reversal of 1363861 is 1683631.

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 164836 + 1199025 = 406^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1363861 - 2¹¹ = 1361813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1363867) 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, 720 + ... + 1801.

It is an arithmetic number, because the mean of its divisors is an integer number (341731).

2^1363861 is an apocalyptic number.

It is an amenable number.

1363861 is a deficient number, since it is larger than the sum of its proper divisors (3063).

1363861 is an equidigital number, since it uses as much as digits as its factorization.

1363861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062.

The product of its digits is 2592, while the sum is 28.

The square root of 1363861 is about 1167.8445958260. The cubic root of 1363861 is about 110.8979122519.

The spelling of 1363861 in words is "one million, three hundred sixty-three thousand, eight hundred sixty-one".