1140491 has 4 divisors (see below), whose sum is σ = 1244184. Its totient is φ = 1036800.

The previous prime is 1140487. The next prime is 1140493. The reversal of 1140491 is 1940411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1940411 = 11 ⋅176401.

It is a cyclic number.

It is not a de Polignac number, because 1140491 - 2² = 1140487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51830 + ... + 51851.

It is an arithmetic number, because the mean of its divisors is an integer number (311046).

2^1140491 is an apocalyptic number.

1140491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1140491 is a deficient number, since it is larger than the sum of its proper divisors (103693).

1140491 is a wasteful number, since it uses less digits than its factorization.

1140491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103692.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1140491 is about 1067.9377322672. The cubic root of 1140491 is about 104.4793881953.

The spelling of 1140491 in words is "one million, one hundred forty thousand, four hundred ninety-one".