1206404 has 6 divisors (see below), whose sum is σ = 2111214. Its totient is φ = 603200.

The previous prime is 1206391. The next prime is 1206407. The reversal of 1206404 is 4046021.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 61504 = 1070^2 + 248^2 .

It is a super-2 number, since 2×1206404² = 2910821222432, which contains 22 as substring.

It is a plaindrome in base 9.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1206407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150797 + ... + 150804.

It is an arithmetic number, because the mean of its divisors is an integer number (351869).

2^1206404 is an apocalyptic number.

It is an amenable number.

1206404 is a deficient number, since it is larger than the sum of its proper divisors (904810).

1206404 is a wasteful number, since it uses less digits than its factorization.

1206404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301605 (or 301603 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1206404 is about 1098.3642383108. The cubic root of 1206404 is about 106.4545567913.

The spelling of 1206404 in words is "one million, two hundred six thousand, four hundred four".