42112645 has 8 divisors (see below), whose sum is σ = 53195040. Its totient is φ = 31916880.

The previous prime is 42112643. The next prime is 42112661. The reversal of 42112645 is 54621124.

It is a happy number.

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

It is not a de Polignac number, because 42112645 - 2¹ = 42112643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42112643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221551 + ... + 221740.

It is an arithmetic number, because the mean of its divisors is an integer number (6649380).

Almost surely, 2^42112645 is an apocalyptic number.

It is an amenable number.

42112645 is a deficient number, since it is larger than the sum of its proper divisors (11082395).

42112645 is a wasteful number, since it uses less digits than its factorization.

42112645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443315.

The product of its digits is 1920, while the sum is 25.

The square root of 42112645 is about 6489.4256294375. The cubic root of 42112645 is about 347.9131466212.

Adding to 42112645 its reverse (54621124), we get a palindrome (96733769).

The spelling of 42112645 in words is "forty-two million, one hundred twelve thousand, six hundred forty-five".