1243392 has 36 divisors (see below), whose sum is σ = 3311280. Its totient is φ = 414208.

The previous prime is 1243391. The next prime is 1243393. The reversal of 1243392 is 2933421.

It is an interprime number because it is at equal distance from previous prime (1243391) and next prime (1243393).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 3 ways as a sum of consecutive naturals, for example, 42 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (91980).

2^1243392 is an apocalyptic number.

1243392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655640).

1243392 is an abundant number, since it is smaller than the sum of its proper divisors (2067888).

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

1243392 is an equidigital number, since it uses as much as digits as its factorization.

1243392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1624 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 1243392 is about 1115.0748853777. The cubic root of 1243392 is about 107.5315789684.

The spelling of 1243392 in words is "one million, two hundred forty-three thousand, three hundred ninety-two".