420042151 has 4 divisors (see below), whose sum is σ = 420091672. Its totient is φ = 419992632.

The previous prime is 420042127. The next prime is 420042193. The reversal of 420042151 is 151240024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 420042151 - 2⁷ = 420042023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420042121) 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, 8460 + ... + 30193.

It is an arithmetic number, because the mean of its divisors is an integer number (105022918).

Almost surely, 2^420042151 is an apocalyptic number.

420042151 is a deficient number, since it is larger than the sum of its proper divisors (49521).

420042151 is a wasteful number, since it uses less digits than its factorization.

420042151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49520.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 420042151 is about 20494.9298852180. The cubic root of 420042151 is about 748.9122905394.

Adding to 420042151 its reverse (151240024), we get a palindrome (571282175).

The spelling of 420042151 in words is "four hundred twenty million, forty-two thousand, one hundred fifty-one".