1140069 has 12 divisors (see below), whose sum is σ = 1744736. Its totient is φ = 648672.

The previous prime is 1139993. The next prime is 1140091. The reversal of 1140069 is 9600411.

It is not a de Polignac number, because 1140069 - 2⁹ = 1139557 is a prime.

It is a super-2 number, since 2×1140069² = 2599514649522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4777 + ... + 5009.

2^1140069 is an apocalyptic number.

It is an amenable number.

1140069 is a deficient number, since it is larger than the sum of its proper divisors (604667).

1140069 is an frugal number, since it uses more digits than its factorization.

1140069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1140069 is about 1067.7401369247. The cubic root of 1140069 is about 104.4665002547.

Multiplying 1140069 by its sum of digits (21), we get a square (23941449 = 4893²).

1140069 divided by its sum of digits (21) gives a square (54289 = 233²).

The spelling of 1140069 in words is "one million, one hundred forty thousand, sixty-nine".