420142323 has 8 divisors (see below), whose sum is σ = 560873728. Its totient is φ = 279752904.

The previous prime is 420142309. The next prime is 420142409. The reversal of 420142323 is 323241024.

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

It is not a de Polignac number, because 420142323 - 2⁵ = 420142291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420142323.

It is not an unprimeable number, because it can be changed into a prime (420142523) 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, 82615 + ... + 87552.

It is an arithmetic number, because the mean of its divisors is an integer number (70109216).

Almost surely, 2^420142323 is an apocalyptic number.

420142323 is a deficient number, since it is larger than the sum of its proper divisors (140731405).

420142323 is a wasteful number, since it uses less digits than its factorization.

420142323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170993.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 420142323 is about 20497.3735634593. The cubic root of 420142323 is about 748.9718195485.

Adding to 420142323 its reverse (323241024), we get a palindrome (743383347).

The spelling of 420142323 in words is "four hundred twenty million, one hundred forty-two thousand, three hundred twenty-three".