1306404 has 36 divisors (see below), whose sum is σ = 3603600. Its totient is φ = 395760.

The previous prime is 1306391. The next prime is 1306411. The reversal of 1306404 is 4046031.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1306404² = 3413382822432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (100100).

2^1306404 is an apocalyptic number.

It is an amenable number.

1306404 is an abundant number, since it is smaller than the sum of its proper divisors (2297196).

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

1306404 is a wasteful number, since it uses less digits than its factorization.

1306404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320 (or 3315 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1306404 is about 1142.9803147911. The cubic root of 1306404 is about 109.3182071413.

The spelling of 1306404 in words is "one million, three hundred six thousand, four hundred four".