420872187 has 8 divisors (see below), whose sum is σ = 561280320. Its totient is φ = 280522760.

The previous prime is 420872159. The next prime is 420872191. The reversal of 420872187 is 781278024.

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

It is a cyclic number.

It is not a de Polignac number, because 420872187 - 2¹⁰ = 420871163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420872107) 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, 6364 + ... + 29702.

It is an arithmetic number, because the mean of its divisors is an integer number (70160040).

Almost surely, 2^420872187 is an apocalyptic number.

420872187 is a deficient number, since it is larger than the sum of its proper divisors (140408133).

420872187 is a wasteful number, since it uses less digits than its factorization.

420872187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29353.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 420872187 is about 20515.1696800197. The cubic root of 420872187 is about 749.4052689624.

The spelling of 420872187 in words is "four hundred twenty million, eight hundred seventy-two thousand, one hundred eighty-seven".