1139144 has 32 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 528000.

The previous prime is 1139143. The next prime is 1139147. The reversal of 1139144 is 4419311.

Together with 1159095 it forms a betrothed pair.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1139141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 7619.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1139144 is an apocalyptic number.

It is an amenable number.

1139144 is an abundant number, since it is smaller than the sum of its proper divisors (1159096).

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

1139144 is a wasteful number, since it uses less digits than its factorization.

1139144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 217 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 1139144 is about 1067.3068911986. The cubic root of 1139144 is about 104.4382394919.

The spelling of 1139144 in words is "one million, one hundred thirty-nine thousand, one hundred forty-four".