1117641 has 12 divisors (see below), whose sum is σ = 1733712. Its totient is φ = 638568.

The previous prime is 1117609. The next prime is 1117657. The reversal of 1117641 is 1467111.

It is not a de Polignac number, because 1117641 - 2⁵ = 1117609 is a prime.

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

It is a Curzon number.

1117641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1117601) 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, 3655 + ... + 3948.

It is an arithmetic number, because the mean of its divisors is an integer number (144476).

2^1117641 is an apocalyptic number.

It is an amenable number.

1117641 is a deficient number, since it is larger than the sum of its proper divisors (616071).

1117641 is an equidigital number, since it uses as much as digits as its factorization.

1117641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620 (or 7613 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 1117641 is about 1057.1854142013. The cubic root of 1117641 is about 103.7769195159.

The spelling of 1117641 in words is "one million, one hundred seventeen thousand, six hundred forty-one".