42012758 has 4 divisors (see below), whose sum is σ = 63019140. Its totient is φ = 21006378.

The previous prime is 42012757. The next prime is 42012787. The reversal of 42012758 is 85721024.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42012758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10503188 + ... + 10503191.

It is an arithmetic number, because the mean of its divisors is an integer number (15754785).

Almost surely, 2^42012758 is an apocalyptic number.

42012758 is a deficient number, since it is larger than the sum of its proper divisors (21006382).

42012758 is a wasteful number, since it uses less digits than its factorization.

42012758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21006381.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42012758 is about 6481.7249247403. The cubic root of 42012758 is about 347.6378570747.

The spelling of 42012758 in words is "forty-two million, twelve thousand, seven hundred fifty-eight".