42111445 has 8 divisors (see below), whose sum is σ = 51034680. Its totient is φ = 33355200.

The previous prime is 42111409. The next prime is 42111473. The reversal of 42111445 is 54411124.

It can be written as a sum of positive squares in 4 ways, for example, as 14085009 + 28026436 = 3753^2 + 5294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42111445 - 2⁹ = 42110933 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41190 + ... + 42199.

It is an arithmetic number, because the mean of its divisors is an integer number (6379335).

Almost surely, 2^42111445 is an apocalyptic number.

It is an amenable number.

42111445 is a deficient number, since it is larger than the sum of its proper divisors (8923235).

42111445 is a wasteful number, since it uses less digits than its factorization.

42111445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83495.

The product of its digits is 640, while the sum is 22.

The square root of 42111445 is about 6489.3331706732. Note that the first 3 decimals coincide. The cubic root of 42111445 is about 347.9098419942.

Adding to 42111445 its reverse (54411124), we get a palindrome (96522569).

The spelling of 42111445 in words is "forty-two million, one hundred eleven thousand, four hundred forty-five".