1161571 has 6 divisors (see below), whose sum is σ = 1192316. Its totient is φ = 1131600.

The previous prime is 1161553. The next prime is 1161581. The reversal of 1161571 is 1751611.

It is not a de Polignac number, because 1161571 - 2⁷ = 1161443 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1161521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1336 + ... + 2026.

2^1161571 is an apocalyptic number.

1161571 is a deficient number, since it is larger than the sum of its proper divisors (30745).

1161571 is an frugal number, since it uses more digits than its factorization.

1161571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 732 counting only the distinct ones).

The product of its digits is 210, while the sum is 22.

The square root of 1161571 is about 1077.7620331038. The cubic root of 1161571 is about 105.1191693089.

The spelling of 1161571 in words is "one million, one hundred sixty-one thousand, five hundred seventy-one".