42393445 has 4 divisors (see below), whose sum is σ = 50872140. Its totient is φ = 33914752.

The previous prime is 42393443. The next prime is 42393473. The reversal of 42393445 is 54439324.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15374241 + 27019204 = 3921^2 + 5198^2 .

It is a cyclic number.

It is not a de Polignac number, because 42393445 - 2¹ = 42393443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42393445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42393443) 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, 4239340 + ... + 4239349.

It is an arithmetic number, because the mean of its divisors is an integer number (12718035).

Almost surely, 2^42393445 is an apocalyptic number.

It is an amenable number.

42393445 is a deficient number, since it is larger than the sum of its proper divisors (8478695).

42393445 is an equidigital number, since it uses as much as digits as its factorization.

42393445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8478694.

The product of its digits is 51840, while the sum is 34.

The square root of 42393445 is about 6511.0248809231. The cubic root of 42393445 is about 348.6847096251.

The spelling of 42393445 in words is "forty-two million, three hundred ninety-three thousand, four hundred forty-five".