1281204 has 24 divisors (see below), whose sum is σ = 3321920. Its totient is φ = 427032.

The previous prime is 1281193. The next prime is 1281211. The reversal of 1281204 is 4021821.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5824 + ... + 6039.

2^1281204 is an apocalyptic number.

It is an amenable number.

1281204 is an abundant number, since it is smaller than the sum of its proper divisors (2040716).

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

1281204 is a wasteful number, since it uses less digits than its factorization.

1281204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11876 (or 11868 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1281204 is about 1131.9028226840. The cubic root of 1281204 is about 108.6107373163.

It can be divided in two parts, 1281 and 204, that added together give a triangular number (1485 = T₅₄).

The spelling of 1281204 in words is "one million, two hundred eighty-one thousand, two hundred four".