1140405 has 16 divisors (see below), whose sum is σ = 2085504. Its totient is φ = 521280.

The previous prime is 1140389. The next prime is 1140413. The reversal of 1140405 is 5040411.

It is not a de Polignac number, because 1140405 - 2⁴ = 1140389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5326 + ... + 5535.

It is an arithmetic number, because the mean of its divisors is an integer number (130344).

2^1140405 is an apocalyptic number.

1140405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1140405 is a deficient number, since it is larger than the sum of its proper divisors (945099).

1140405 is a wasteful number, since it uses less digits than its factorization.

1140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1140405 is about 1067.8974669883. The cubic root of 1140405 is about 104.4767620009.

Adding to 1140405 its reverse (5040411), we get a palindrome (6180816).

The spelling of 1140405 in words is "one million, one hundred forty thousand, four hundred five".