42645243 has 16 divisors (see below), whose sum is σ = 61249536. Its totient is φ = 26315520.

The previous prime is 42645241. The next prime is 42645257. The reversal of 42645243 is 34254624.

It is not a de Polignac number, because 42645243 - 2¹ = 42645241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42645243.

It is not an unprimeable number, because it can be changed into a prime (42645241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7830 + ... + 12107.

It is an arithmetic number, because the mean of its divisors is an integer number (3828096).

Almost surely, 2^42645243 is an apocalyptic number.

42645243 is a deficient number, since it is larger than the sum of its proper divisors (18604293).

42645243 is a wasteful number, since it uses less digits than its factorization.

42645243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19994.

The product of its digits is 23040, while the sum is 30.

The square root of 42645243 is about 6530.3325336464. The cubic root of 42645243 is about 349.3736908008.

Adding to 42645243 its reverse (34254624), we get a palindrome (76899867).

The spelling of 42645243 in words is "forty-two million, six hundred forty-five thousand, two hundred forty-three".