42030578 has 4 divisors (see below), whose sum is σ = 63045870. Its totient is φ = 21015288.

The previous prime is 42030577. The next prime is 42030581. The reversal of 42030578 is 87503024.

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., 29235649 + 12794929 = 5407^2 + 3577^2 .

It is a super-3 number, since 3×42030578³ (a number of 24 digits) contains 333 as substring.

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 42030578.

It is not an unprimeable number, because it can be changed into a prime (42030577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507643 + ... + 10507646.

Almost surely, 2^42030578 is an apocalyptic number.

42030578 is a deficient number, since it is larger than the sum of its proper divisors (21015292).

42030578 is a wasteful number, since it uses less digits than its factorization.

42030578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21015291.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 42030578 is about 6483.0994130894. The cubic root of 42030578 is about 347.6870011223.

The spelling of 42030578 in words is "forty-two million, thirty thousand, five hundred seventy-eight".