187428201 has 16 divisors (see below), whose sum is σ = 258416640. Its totient is φ = 120710160.

The previous prime is 187428181. The next prime is 187428203. The reversal of 187428201 is 102824781.

It is a happy number.

It is not a de Polignac number, because 187428201 - 2¹⁴ = 187411817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (187428203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65466 + ... + 68268.

It is an arithmetic number, because the mean of its divisors is an integer number (16151040).

Almost surely, 2^187428201 is an apocalyptic number.

It is an amenable number.

187428201 is a deficient number, since it is larger than the sum of its proper divisors (70988439).

187428201 is a wasteful number, since it uses less digits than its factorization.

187428201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 187428201 is about 13690.4419578040. The cubic root of 187428201 is about 572.2840547602.

The spelling of 187428201 in words is "one hundred eighty-seven million, four hundred twenty-eight thousand, two hundred one".