978201 has 12 divisors (see below), whose sum is σ = 1614912. Its totient is φ = 558936.

The previous prime is 978181. The next prime is 978203. The reversal of 978201 is 102879.

It is not a de Polignac number, because 978201 - 2⁷ = 978073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7701 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (134576).

2⁹⁷⁸²⁰¹ is an apocalyptic number.

It is an amenable number.

978201 is a deficient number, since it is larger than the sum of its proper divisors (636711).

978201 is a wasteful number, since it uses less digits than its factorization.

978201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15540 (or 15537 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 978201 is about 989.0404440669. The cubic root of 978201 is about 99.2680218190.

It can be divided in two parts, 9 and 78201, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 978201 in words is "nine hundred seventy-eight thousand, two hundred one".