1140399 has 36 divisors (see below), whose sum is σ = 1941576. Its totient is φ = 664848.

The previous prime is 1140389. The next prime is 1140413. The reversal of 1140399 is 9930411.

It is not a de Polignac number, because 1140399 - 2⁴ = 1140383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140319) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 60012 + ... + 60030.

2^1140399 is an apocalyptic number.

1140399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1140399 is a deficient number, since it is larger than the sum of its proper divisors (801177).

1140399 is an equidigital number, since it uses as much as digits as its factorization.

1140399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1140399 is about 1067.8946577261. The cubic root of 1140399 is about 104.4765787731.

The spelling of 1140399 in words is "one million, one hundred forty thousand, three hundred ninety-nine".