1131996 has 48 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 341760.

The previous prime is 1131973. The next prime is 1131997. The reversal of 1131996 is 6991311.

1131996 = 250² + 251² + ... + 266².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6235 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^1131996 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 1131996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

1131996 is an abundant number, since it is smaller than the sum of its proper divisors (1771044).

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

1131996 is a wasteful number, since it uses less digits than its factorization.

1131996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 232 counting only the distinct ones).

The product of its digits is 1458, while the sum is 30.

The square root of 1131996 is about 1063.9530064810. The cubic root of 1131996 is about 104.2193349301.

The spelling of 1131996 in words is "one million, one hundred thirty-one thousand, nine hundred ninety-six".