1140661 has 8 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 1085280.

The previous prime is 1140637. The next prime is 1140677. The reversal of 1140661 is 1660411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1140661 - 2⁷ = 1140533 is a prime.

It is a super-2 number, since 2×1140661² = 2602215033842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440 + ... + 2086.

It is an arithmetic number, because the mean of its divisors is an integer number (149688).

2^1140661 is an apocalyptic number.

It is an amenable number.

1140661 is a deficient number, since it is larger than the sum of its proper divisors (56843).

1140661 is an equidigital number, since it uses as much as digits as its factorization.

1140661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1140661 is about 1068.0173219569. The cubic root of 1140661 is about 104.4845791214.

Adding to 1140661 its product of nonzero digits (144), we get a triangular number (1140805 = T₁₅₁₀).

The spelling of 1140661 in words is "one million, one hundred forty thousand, six hundred sixty-one".