42023902 has 4 divisors (see below), whose sum is σ = 63035856. Its totient is φ = 21011950.

The previous prime is 42023873. The next prime is 42023903. The reversal of 42023902 is 20932024.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42023903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505974 + ... + 10505977.

It is an arithmetic number, because the mean of its divisors is an integer number (15758964).

Almost surely, 2^42023902 is an apocalyptic number.

42023902 is a deficient number, since it is larger than the sum of its proper divisors (21011954).

42023902 is a wasteful number, since it uses less digits than its factorization.

42023902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21011953.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 42023902 is about 6482.5845154537. The cubic root of 42023902 is about 347.6685916577.

Adding to 42023902 its reverse (20932024), we get a palindrome (62955926).

The spelling of 42023902 in words is "forty-two million, twenty-three thousand, nine hundred two".