1213404 has 12 divisors (see below), whose sum is σ = 2831304. Its totient is φ = 404464.

The previous prime is 1213379. The next prime is 1213427. The reversal of 1213404 is 4043121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50547 + ... + 50570.

It is an arithmetic number, because the mean of its divisors is an integer number (235942).

2^1213404 is an apocalyptic number.

It is an amenable number.

1213404 is an abundant number, since it is smaller than the sum of its proper divisors (1617900).

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

1213404 is a wasteful number, since it uses less digits than its factorization.

1213404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101124 (or 101122 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1213404 is about 1101.5461860494. The cubic root of 1213404 is about 106.6600560139.

Adding to 1213404 its reverse (4043121), we get a palindrome (5256525).

The spelling of 1213404 in words is "one million, two hundred thirteen thousand, four hundred four".