1161001571 has 2 divisors, whose sum is σ = 1161001572. Its totient is φ = 1161001570.

The previous prime is 1161001561. The next prime is 1161001607. The reversal of 1161001571 is 1751001611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161001571 - 2¹⁴ = 1160985187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161001561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580500785 + 580500786.

It is an arithmetic number, because the mean of its divisors is an integer number (580500786).

Almost surely, 2^1161001571 is an apocalyptic number.

1161001571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161001571 is an equidigital number, since it uses as much as digits as its factorization.

1161001571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 23.

The square root of 1161001571 is about 34073.4731279334. The cubic root of 1161001571 is about 1051.0198921760.

The spelling of 1161001571 in words is "one billion, one hundred sixty-one million, one thousand, five hundred seventy-one".