420001191 has 12 divisors (see below), whose sum is σ = 607000680. Its totient is φ = 279847440.

The previous prime is 420001189. The next prime is 420001199. The reversal of 420001191 is 191100024.

It is not a de Polignac number, because 420001191 - 2¹ = 420001189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420001199) 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, 6021 + ... + 29601.

It is an arithmetic number, because the mean of its divisors is an integer number (50583390).

Almost surely, 2^420001191 is an apocalyptic number.

420001191 is a deficient number, since it is larger than the sum of its proper divisors (186999489).

420001191 is a wasteful number, since it uses less digits than its factorization.

420001191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25566 (or 25563 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 420001191 is about 20493.9305893233. The cubic root of 420001191 is about 748.8879465979.

The spelling of 420001191 in words is "four hundred twenty million, one thousand, one hundred ninety-one".