85156001 has 16 divisors (see below), whose sum is σ = 100310400. Its totient is φ = 70781568.

The previous prime is 85155991. The next prime is 85156003. The reversal of 85156001 is 10065158.

It is a cyclic number.

It is not a de Polignac number, because 85156001 - 2⁶ = 85155937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85156003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31730 + ... + 34308.

It is an arithmetic number, because the mean of its divisors is an integer number (6269400).

Almost surely, 2^85156001 is an apocalyptic number.

It is an amenable number.

85156001 is a deficient number, since it is larger than the sum of its proper divisors (15154399).

85156001 is a wasteful number, since it uses less digits than its factorization.

85156001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 85156001 is about 9228.0009211096. Note that the first 3 decimals coincide. The cubic root of 85156001 is about 439.9517870726.

The spelling of 85156001 in words is "eighty-five million, one hundred fifty-six thousand, one".