1356879 has 4 divisors (see below), whose sum is σ = 1809176. Its totient is φ = 904584.

The previous prime is 1356877. The next prime is 1356899. The reversal of 1356879 is 9786531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9786531 = 3 ⋅3262177.

It is not a de Polignac number, because 1356879 - 2¹ = 1356877 is a prime.

It is a super-2 number, since 2×1356879² = 3682241241282, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 3¹² + 5 + 6⁴ + 8³ + 7⁷ + 9² .

It is a D-number.

It is a Duffinian number.

1356879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356871) 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 3 ways as a sum of consecutive naturals, for example, 226144 + ... + 226149.

It is an arithmetic number, because the mean of its divisors is an integer number (452294).

2^1356879 is an apocalyptic number.

1356879 is a deficient number, since it is larger than the sum of its proper divisors (452297).

1356879 is an equidigital number, since it uses as much as digits as its factorization.

1356879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452296.

The product of its digits is 45360, while the sum is 39.

The square root of 1356879 is about 1164.8514926805. The cubic root of 1356879 is about 110.7083488814.

The spelling of 1356879 in words is "one million, three hundred fifty-six thousand, eight hundred seventy-nine".