1143690 has 32 divisors (see below), whose sum is σ = 2790720. Its totient is φ = 299904.

The previous prime is 1143679. The next prime is 1143697. The reversal of 1143690 is 963411.

It is a super-2 number, since 2×1143690² = 2616053632200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143690.

It is not an unprimeable number, because it can be changed into a prime (1143697) 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, 1726 + ... + 2294.

It is an arithmetic number, because the mean of its divisors is an integer number (87210).

2^1143690 is an apocalyptic number.

1143690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395360).

1143690 is an abundant number, since it is smaller than the sum of its proper divisors (1647030).

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

1143690 is a wasteful number, since it uses less digits than its factorization.

1143690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1143690 is about 1069.4344299675. The cubic root of 1143690 is about 104.5769828722.

The spelling of 1143690 in words is "one million, one hundred forty-three thousand, six hundred ninety".