420007427 has 4 divisors (see below), whose sum is σ = 480008496. Its totient is φ = 360006360.

The previous prime is 420007397. The next prime is 420007433. The reversal of 420007427 is 724700024.

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

It is not a de Polignac number, because 420007427 - 2¹⁶ = 419941891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420007396 and 420007405.

It is not an unprimeable number, because it can be changed into a prime (420007477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30000524 + ... + 30000537.

It is an arithmetic number, because the mean of its divisors is an integer number (120002124).

Almost surely, 2^420007427 is an apocalyptic number.

420007427 is a deficient number, since it is larger than the sum of its proper divisors (60001069).

420007427 is an equidigital number, since it uses as much as digits as its factorization.

420007427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60001068.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 420007427 is about 20494.0827313642. The cubic root of 420007427 is about 748.8916529701.

The spelling of 420007427 in words is "four hundred twenty million, seven thousand, four hundred twenty-seven".