1003161 has 4 divisors (see below), whose sum is σ = 1337552. Its totient is φ = 668772.

The previous prime is 1003141. The next prime is 1003193. The reversal of 1003161 is 1613001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1003161 - 2⁶ = 1003097 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003111) 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, 167191 + ... + 167196.

It is an arithmetic number, because the mean of its divisors is an integer number (334388).

2^1003161 is an apocalyptic number.

It is an amenable number.

1003161 is a deficient number, since it is larger than the sum of its proper divisors (334391).

1003161 is an equidigital number, since it uses as much as digits as its factorization.

1003161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334390.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1003161 is about 1001.5792529800. The cubic root of 1003161 is about 100.1052558399.

Adding to 1003161 its reverse (1613001), we get a palindrome (2616162).

The spelling of 1003161 in words is "one million, three thousand, one hundred sixty-one".