42120203 has 4 divisors (see below), whose sum is σ = 44597880. Its totient is φ = 39642528.

The previous prime is 42120191. The next prime is 42120217. The reversal of 42120203 is 30202124.

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 42120203 - 2⁸ = 42119947 is a prime.

It is a super-2 number, since 2×42120203² = 3548223001522418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42120233) 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, 1238813 + ... + 1238846.

It is an arithmetic number, because the mean of its divisors is an integer number (11149470).

Almost surely, 2^42120203 is an apocalyptic number.

42120203 is a deficient number, since it is larger than the sum of its proper divisors (2477677).

42120203 is a wasteful number, since it uses less digits than its factorization.

42120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477676.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 42120203 is about 6490.0079352802. The cubic root of 42120203 is about 347.9339588204.

Adding to 42120203 its reverse (30202124), we get a palindrome (72322327).

The spelling of 42120203 in words is "forty-two million, one hundred twenty thousand, two hundred three".