420112491 has 4 divisors (see below), whose sum is σ = 560149992. Its totient is φ = 280074992.

The previous prime is 420112453. The next prime is 420112493. The reversal of 420112491 is 194211024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420112491 - 2¹³ = 420104299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420112493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70018746 + ... + 70018751.

It is an arithmetic number, because the mean of its divisors is an integer number (140037498).

Almost surely, 2^420112491 is an apocalyptic number.

420112491 is a deficient number, since it is larger than the sum of its proper divisors (140037501).

420112491 is a wasteful number, since it uses less digits than its factorization.

420112491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140037500.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 420112491 is about 20496.6458475527. The cubic root of 420112491 is about 748.9540923364.

The spelling of 420112491 in words is "four hundred twenty million, one hundred twelve thousand, four hundred ninety-one".