1331404 has 6 divisors (see below), whose sum is σ = 2329964. Its totient is φ = 665700.

The previous prime is 1331399. The next prime is 1331411. The reversal of 1331404 is 4041331.

It is a super-2 number, since 2×1331404² = 3545273222432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166422 + ... + 166429.

2^1331404 is an apocalyptic number.

It is an amenable number.

1331404 is a deficient number, since it is larger than the sum of its proper divisors (998560).

1331404 is a wasteful number, since it uses less digits than its factorization.

1331404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332855 (or 332853 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1331404 is about 1153.8648101056. The cubic root of 1331404 is about 110.0111283507.

Adding to 1331404 its reverse (4041331), we get a palindrome (5372735).

The spelling of 1331404 in words is "one million, three hundred thirty-one thousand, four hundred four".