420051 has 8 divisors (see below), whose sum is σ = 564160. Its totient is φ = 277992.

The previous prime is 420047. The next prime is 420073. The reversal of 420051 is 150024.

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

It is not a de Polignac number, because 420051 - 2² = 420047 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420001) 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, 60 + ... + 918.

It is an arithmetic number, because the mean of its divisors is an integer number (70520).

2⁴²⁰⁰⁵¹ is an apocalyptic number.

420051 is a deficient number, since it is larger than the sum of its proper divisors (144109).

420051 is a wasteful number, since it uses less digits than its factorization.

420051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 420051 is about 648.1134160006. The cubic root of 420051 is about 74.8917549598.

Adding to 420051 its reverse (150024), we get a palindrome (570075).

The spelling of 420051 in words is "four hundred twenty thousand, fifty-one".