1356404 has 24 divisors (see below), whose sum is σ = 2737728. Its totient is φ = 576000.

The previous prime is 1356401. The next prime is 1356409. The reversal of 1356404 is 4046531.

It is a happy number.

It is a super-2 number, since 2×1356404² = 3679663622432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1356404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5279 + ... + 5529.

It is an arithmetic number, because the mean of its divisors is an integer number (114072).

2^1356404 is an apocalyptic number.

1356404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1356404 is an abundant number, since it is smaller than the sum of its proper divisors (1381324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1356404 is a wasteful number, since it uses less digits than its factorization.

1356404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1356404 is about 1164.6475861822. The cubic root of 1356404 is about 110.6954288880.

The spelling of 1356404 in words is "one million, three hundred fifty-six thousand, four hundred four".