1361831 has 2 divisors, whose sum is σ = 1361832. Its totient is φ = 1361830.

The previous prime is 1361827. The next prime is 1361839. The reversal of 1361831 is 1381631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361831 - 2² = 1361827 is a prime.

It is a super-2 number, since 2×1361831² = 3709167345122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1361797 and 1361806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680915 + 680916.

It is an arithmetic number, because the mean of its divisors is an integer number (680916).

2^1361831 is an apocalyptic number.

1361831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361831 is an equidigital number, since it uses as much as digits as its factorization.

1361831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 1361831 is about 1166.9751496926. The cubic root of 1361831 is about 110.8428639866.

The spelling of 1361831 in words is "one million, three hundred sixty-one thousand, eight hundred thirty-one".