42091203 has 32 divisors (see below), whose sum is σ = 70341120. Its totient is φ = 21749760.

The previous prime is 42091199. The next prime is 42091207. The reversal of 42091203 is 30219024.

It is an interprime number because it is at equal distance from previous prime (42091199) and next prime (42091207).

It is not a de Polignac number, because 42091203 - 2² = 42091199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 42091203.

It is not an unprimeable number, because it can be changed into a prime (42091207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59013 + ... + 59721.

It is an arithmetic number, because the mean of its divisors is an integer number (2198160).

Almost surely, 2^42091203 is an apocalyptic number.

42091203 is a deficient number, since it is larger than the sum of its proper divisors (28249917).

42091203 is a wasteful number, since it uses less digits than its factorization.

42091203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 42091203 is about 6487.7733468425. The cubic root of 42091203 is about 347.8540889823.

The spelling of 42091203 in words is "forty-two million, ninety-one thousand, two hundred three".