1243684 has 12 divisors (see below), whose sum is σ = 2343964. Its totient is φ = 573984.

The previous prime is 1243673. The next prime is 1243691. The reversal of 1243684 is 4863421.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 792100 = 672^2 + 890^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 11907 + ... + 12010.

2^1243684 is an apocalyptic number.

It is an amenable number.

1243684 is a deficient number, since it is larger than the sum of its proper divisors (1100280).

1243684 is a wasteful number, since it uses less digits than its factorization.

1243684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23934 (or 23932 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 1243684 is about 1115.2058106018. The cubic root of 1243684 is about 107.5399959341.

The spelling of 1243684 in words is "one million, two hundred forty-three thousand, six hundred eighty-four".