855842201 has 4 divisors (see below), whose sum is σ = 875745552. Its totient is φ = 835938852.

The previous prime is 855842189. The next prime is 855842209. The reversal of 855842201 is 102248558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855842201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855842209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9951611 + ... + 9951696.

It is an arithmetic number, because the mean of its divisors is an integer number (218936388).

Almost surely, 2^855842201 is an apocalyptic number.

It is an amenable number.

855842201 is a deficient number, since it is larger than the sum of its proper divisors (19903351).

855842201 is a wasteful number, since it uses less digits than its factorization.

855842201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19903350.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 855842201 is about 29254.7808229698. The cubic root of 855842201 is about 949.4335315439.

The spelling of 855842201 in words is "eight hundred fifty-five million, eight hundred forty-two thousand, two hundred one".