42966578 has 8 divisors (see below), whose sum is σ = 64683372. Its totient is φ = 21405456.

The previous prime is 42966571. The next prime is 42966593. The reversal of 42966578 is 87566924.

It can be written as a sum of positive squares in 2 ways, for example, as 37662769 + 5303809 = 6137^2 + 2303^2 .

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

It is a super-2 number, since 2×42966578² = 3692253650060168, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42966571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38225 + ... + 39332.

Almost surely, 2^42966578 is an apocalyptic number.

42966578 is a deficient number, since it is larger than the sum of its proper divisors (21716794).

42966578 is a wasteful number, since it uses less digits than its factorization.

42966578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77836.

The product of its digits is 725760, while the sum is 47.

The square root of 42966578 is about 6554.8896253103. The cubic root of 42966578 is about 350.2490146282.

The spelling of 42966578 in words is "forty-two million, nine hundred sixty-six thousand, five hundred seventy-eight".