1243206 has 12 divisors (see below), whose sum is σ = 2693652. Its totient is φ = 414396.

The previous prime is 1243181. The next prime is 1243211. The reversal of 1243206 is 6023421.

It is a happy number.

It is a super-2 number, since 2×1243206² = 3091122316872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 69067 = 1243206 / (1 + 2 + 4 + 3 + 2 + 0 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34516 + ... + 34551.

It is an arithmetic number, because the mean of its divisors is an integer number (224471).

2^1243206 is an apocalyptic number.

1243206 is an abundant number, since it is smaller than the sum of its proper divisors (1450446).

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

1243206 is a wasteful number, since it uses less digits than its factorization.

1243206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69075 (or 69072 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1243206 is about 1114.9914797881. The cubic root of 1243206 is about 107.5262167895.

Adding to 1243206 its reverse (6023421), we get a palindrome (7266627).

The spelling of 1243206 in words is "one million, two hundred forty-three thousand, two hundred six".