42125243 has 4 divisors (see below), whose sum is σ = 42138528. Its totient is φ = 42111960.

The previous prime is 42125227. The next prime is 42125267. The reversal of 42125243 is 34252124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42125243 - 2⁴ = 42125227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42125543) 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, 1205 + ... + 9257.

It is an arithmetic number, because the mean of its divisors is an integer number (10534632).

Almost surely, 2^42125243 is an apocalyptic number.

42125243 is a deficient number, since it is larger than the sum of its proper divisors (13285).

42125243 is an equidigital number, since it uses as much as digits as its factorization.

42125243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13284.

The product of its digits is 1920, while the sum is 23.

The square root of 42125243 is about 6490.3962128671. The cubic root of 42125243 is about 347.9478359078.

Adding to 42125243 its reverse (34252124), we get a palindrome (76377367).

The spelling of 42125243 in words is "forty-two million, one hundred twenty-five thousand, two hundred forty-three".