1243396 has 36 divisors (see below), whose sum is σ = 2740864. Its totient is φ = 483120.

The previous prime is 1243393. The next prime is 1243421. The reversal of 1243396 is 6933421.

It is a super-2 number, since 2×1243396² = 3092067225632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3205 + ... + 3571.

2^1243396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370432).

1243396 is an abundant number, since it is smaller than the sum of its proper divisors (1497468).

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

1243396 is a wasteful number, since it uses less digits than its factorization.

1243396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 387 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 1243396 is about 1115.0766789777. The cubic root of 1243396 is about 107.5316942782.

The spelling of 1243396 in words is "one million, two hundred forty-three thousand, three hundred ninety-six".