1001572161 has 8 divisors (see below), whose sum is σ = 1336337184. Its totient is φ = 667260960.

The previous prime is 1001572147. The next prime is 1001572163. The reversal of 1001572161 is 1612751001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001572161 - 2⁶ = 1001572097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001572163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108271 + ... + 117156.

It is an arithmetic number, because the mean of its divisors is an integer number (167042148).

Almost surely, 2^1001572161 is an apocalyptic number.

It is an amenable number.

1001572161 is a deficient number, since it is larger than the sum of its proper divisors (334765023).

1001572161 is a wasteful number, since it uses less digits than its factorization.

1001572161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226911.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 1001572161 is about 31647.6248871855. The cubic root of 1001572161 is about 1000.5237792740.

The spelling of 1001572161 in words is "one billion, one million, five hundred seventy-two thousand, one hundred sixty-one".