42545243 has 12 divisors (see below), whose sum is σ = 46836288. Its totient is φ = 38619360.

The previous prime is 42545221. The next prime is 42545287. The reversal of 42545243 is 34254524.

It is not a de Polignac number, because 42545243 - 2⁶ = 42545179 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (42545143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8246 + ... + 12372.

It is an arithmetic number, because the mean of its divisors is an integer number (3903024).

Almost surely, 2^42545243 is an apocalyptic number.

42545243 is a deficient number, since it is larger than the sum of its proper divisors (4291045).

42545243 is a wasteful number, since it uses less digits than its factorization.

42545243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214 (or 4201 counting only the distinct ones).

The product of its digits is 19200, while the sum is 29.

The square root of 42545243 is about 6522.6714619088. The cubic root of 42545243 is about 349.1003917505.

Adding to 42545243 its reverse (34254524), we get a palindrome (76799767).

The spelling of 42545243 in words is "forty-two million, five hundred forty-five thousand, two hundred forty-three".