1171001 has 10 divisors (see below), whose sum is σ = 1299522. Its totient is φ = 1054560.

The previous prime is 1170979. The next prime is 1171031. The reversal of 1171001 is 1001711.

It can be written as a sum of positive squares in 5 ways, for example, as 1155625 + 15376 = 1075^2 + 124^2 .

It is not a de Polignac number, because 1171001 - 2¹⁸ = 908857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171031) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28541 + ... + 28581.

2^1171001 is an apocalyptic number.

It is an amenable number.

1171001 is a deficient number, since it is larger than the sum of its proper divisors (128521).

1171001 is an frugal number, since it uses more digits than its factorization.

1171001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 7, while the sum is 11.

The square root of 1171001 is about 1082.1279961262. The cubic root of 1171001 is about 105.4028665054.

Adding to 1171001 its reverse (1001711), we get a palindrome (2172712).

The spelling of 1171001 in words is "one million, one hundred seventy-one thousand, one".