1231392 has 48 divisors (see below), whose sum is σ = 3290112. Its totient is φ = 403200.

The previous prime is 1231387. The next prime is 1231411. The reversal of 1231392 is 2931321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a zygodrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9633 + ... + 9759.

It is an arithmetic number, because the mean of its divisors is an integer number (68544).

2^1231392 is an apocalyptic number.

1231392 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 1231392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645056).

1231392 is an abundant number, since it is smaller than the sum of its proper divisors (2058720).

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

1231392 is a wasteful number, since it uses less digits than its factorization.

1231392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 233 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 1231392 is about 1109.6810352529. The cubic root of 1231392 is about 107.1845303288.

The spelling of 1231392 in words is "one million, two hundred thirty-one thousand, three hundred ninety-two".