1356861 has 8 divisors (see below), whose sum is σ = 1973664. Its totient is φ = 822320.

The previous prime is 1356857. The next prime is 1356869. The reversal of 1356861 is 1686531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1356861 - 2² = 1356857 is a prime.

1356861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20526 + ... + 20591.

It is an arithmetic number, because the mean of its divisors is an integer number (246708).

2^1356861 is an apocalyptic number.

1356861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1356861 is a deficient number, since it is larger than the sum of its proper divisors (616803).

1356861 is a wasteful number, since it uses less digits than its factorization.

1356861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41131.

The product of its digits is 4320, while the sum is 30.

The square root of 1356861 is about 1164.8437663481. The cubic root of 1356861 is about 110.7078593366.

It can be divided in two parts, 135 and 6861, that added together give a palindrome (6996).

The spelling of 1356861 in words is "one million, three hundred fifty-six thousand, eight hundred sixty-one".