1140644 has 6 divisors (see below), whose sum is σ = 1996134. Its totient is φ = 570320.

The previous prime is 1140637. The next prime is 1140677. The reversal of 1140644 is 4460411.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 238144 = 950^2 + 488^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142577 + ... + 142584.

It is an arithmetic number, because the mean of its divisors is an integer number (332689).

2^1140644 is an apocalyptic number.

It is an amenable number.

1140644 is a deficient number, since it is larger than the sum of its proper divisors (855490).

1140644 is a wasteful number, since it uses less digits than its factorization.

1140644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285165 (or 285163 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1140644 is about 1068.0093632548. The cubic root of 1140644 is about 104.4840600520.

Subtracting from 1140644 its sum of digits (20), we obtain a square (1140624 = 1068²).

The spelling of 1140644 in words is "one million, one hundred forty thousand, six hundred forty-four".