1161903 has 8 divisors (see below), whose sum is σ = 1585408. Its totient is φ = 756504.

The previous prime is 1161893. The next prime is 1161929. The reversal of 1161903 is 3091611.

It is a happy number.

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

It is not a de Polignac number, because 1161903 - 2⁵ = 1161871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4375 + ... + 4632.

It is an arithmetic number, because the mean of its divisors is an integer number (198176).

2^1161903 is an apocalyptic number.

1161903 is a deficient number, since it is larger than the sum of its proper divisors (423505).

1161903 is an equidigital number, since it uses as much as digits as its factorization.

1161903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9053.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1161903 is about 1077.9160449683. The cubic root of 1161903 is about 105.1291834018.

The spelling of 1161903 in words is "one million, one hundred sixty-one thousand, nine hundred three".