42159946 has 8 divisors (see below), whose sum is σ = 64949220. Its totient is φ = 20510208.

The previous prime is 42159889. The next prime is 42159947. The reversal of 42159946 is 64995124.

It can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 10923025 = 5589^2 + 3305^2 .

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

It is a super-2 number, since 2×42159946² = 3554922093445832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42159899 and 42159908.

It is not an unprimeable number, because it can be changed into a prime (42159947) 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, 284791 + ... + 284938.

Almost surely, 2^42159946 is an apocalyptic number.

42159946 is a deficient number, since it is larger than the sum of its proper divisors (22789274).

42159946 is a wasteful number, since it uses less digits than its factorization.

42159946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569768.

The product of its digits is 77760, while the sum is 40.

The square root of 42159946 is about 6493.0690740204. The cubic root of 42159946 is about 348.0433567771.

It can be divided in two parts, 4215 and 9946, that added together give a square (14161 = 119²).

The spelling of 42159946 in words is "forty-two million, one hundred fifty-nine thousand, nine hundred forty-six".