1147992 has 32 divisors (see below), whose sum is σ = 2964480. Its totient is φ = 370080.

The previous prime is 1147987. The next prime is 1147997. The reversal of 1147992 is 2997411.

It is an interprime number because it is at equal distance from previous prime (1147987) and next prime (1147997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147997) by changing a digit.

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, 28 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (92640).

2^1147992 is an apocalyptic number.

1147992 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 1147992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1482240).

1147992 is an abundant number, since it is smaller than the sum of its proper divisors (1816488).

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

1147992 is a wasteful number, since it uses less digits than its factorization.

1147992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583 (or 1579 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 1147992 is about 1071.4438856048. The cubic root of 1147992 is about 104.7079412226.

The spelling of 1147992 in words is "one million, one hundred forty-seven thousand, nine hundred ninety-two".