420115051 has 4 divisors (see below), whose sum is σ = 424446232. Its totient is φ = 415783872.

The previous prime is 420115049. The next prime is 420115081. The reversal of 420115051 is 150511024.

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 420115051 - 2¹ = 420115049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420115081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165445 + ... + 2165638.

It is an arithmetic number, because the mean of its divisors is an integer number (106111558).

Almost surely, 2^420115051 is an apocalyptic number.

420115051 is a deficient number, since it is larger than the sum of its proper divisors (4331181).

420115051 is an equidigital number, since it uses as much as digits as its factorization.

420115051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331180.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 420115051 is about 20496.7082966997. The cubic root of 420115051 is about 748.9556136104.

Adding to 420115051 its reverse (150511024), we get a palindrome (570626075).

The spelling of 420115051 in words is "four hundred twenty million, one hundred fifteen thousand, fifty-one".