420142165 has 16 divisors (see below), whose sum is σ = 545190912. Its totient is φ = 309608704.

The previous prime is 420142153. The next prime is 420142171. The reversal of 420142165 is 561241024.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420142165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48589 + ... + 56578.

It is an arithmetic number, because the mean of its divisors is an integer number (34074432).

Almost surely, 2^420142165 is an apocalyptic number.

It is an amenable number.

420142165 is a deficient number, since it is larger than the sum of its proper divisors (125048747).

420142165 is a wasteful number, since it uses less digits than its factorization.

420142165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105236.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 420142165 is about 20497.3697093066. The cubic root of 420142165 is about 748.9717256616.

Adding to 420142165 its reverse (561241024), we get a palindrome (981383189).

The spelling of 420142165 in words is "four hundred twenty million, one hundred forty-two thousand, one hundred sixty-five".