420122387 has 4 divisors (see below), whose sum is σ = 420669480. Its totient is φ = 419575296.

The previous prime is 420122363. The next prime is 420122399. The reversal of 420122387 is 783221024.

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 420122387 - 2²² = 415928083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420122687) 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, 272393 + ... + 273930.

It is an arithmetic number, because the mean of its divisors is an integer number (105167370).

Almost surely, 2^420122387 is an apocalyptic number.

420122387 is a deficient number, since it is larger than the sum of its proper divisors (547093).

420122387 is an equidigital number, since it uses as much as digits as its factorization.

420122387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547092.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 420122387 is about 20496.8872514828. The cubic root of 420122387 is about 748.9599729769.

The spelling of 420122387 in words is "four hundred twenty million, one hundred twenty-two thousand, three hundred eighty-seven".