42750122 has 4 divisors (see below), whose sum is σ = 64125186. Its totient is φ = 21375060.

The previous prime is 42750101. The next prime is 42750137. The reversal of 42750122 is 22105724.

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 only one way, i.e., 26822041 + 15928081 = 5179^2 + 3991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687529 + ... + 10687532.

Almost surely, 2^42750122 is an apocalyptic number.

42750122 is a deficient number, since it is larger than the sum of its proper divisors (21375064).

42750122 is a wasteful number, since it uses less digits than its factorization.

42750122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21375063.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 42750122 is about 6538.3577448775. The cubic root of 42750122 is about 349.6598654783.

Adding to 42750122 its reverse (22105724), we get a palindrome (64855846).

The spelling of 42750122 in words is "forty-two million, seven hundred fifty thousand, one hundred twenty-two".