171072001 has 2 divisors, whose sum is σ = 171072002. Its totient is φ = 171072000.

The previous prime is 171071993. The next prime is 171072007. The reversal of 171072001 is 100270171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119246400 + 51825601 = 10920^2 + 7199^2 .

It is an emirp because it is prime and its reverse (100270171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171072001 - 2³ = 171071993 is a prime.

It is a super-2 number, since 2×171072001² = 58531259052288002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 171072001.

It is not a weakly prime, because it can be changed into another prime (171072007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85536000 + 85536001.

It is an arithmetic number, because the mean of its divisors is an integer number (85536001).

Almost surely, 2^171072001 is an apocalyptic number.

It is an amenable number.

171072001 is a deficient number, since it is larger than the sum of its proper divisors (1).

171072001 is an equidigital number, since it uses as much as digits as its factorization.

171072001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 171072001 is about 13079.4495679291. The cubic root of 171072001 is about 555.1278021836.

The spelling of 171072001 in words is "one hundred seventy-one million, seventy-two thousand, one".