42015546 has 24 divisors (see below), whose sum is σ = 91440180. Its totient is φ = 13942656.

The previous prime is 42015541. The next prime is 42015559. The reversal of 42015546 is 64551024.

It can be written as a sum of positive squares in 2 ways, for example, as 36469521 + 5546025 = 6039^2 + 2355^2 .

It is a super-2 number, since 2×42015546² = 3530612211356232, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42015541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 975 + ... + 9218.

Almost surely, 2^42015546 is an apocalyptic number.

42015546 is an abundant number, since it is smaller than the sum of its proper divisors (49424634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42015546 is a wasteful number, since it uses less digits than its factorization.

42015546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10430 (or 10427 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 42015546 is about 6481.9399873803. The cubic root of 42015546 is about 347.6455467460.

The spelling of 42015546 in words is "forty-two million, fifteen thousand, five hundred forty-six".