42066049 has 4 divisors (see below), whose sum is σ = 42112260. Its totient is φ = 42019840.

The previous prime is 42066023. The next prime is 42066067. The reversal of 42066049 is 94066024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16056049 + 26010000 = 4007^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 42066049 - 2²⁵ = 8511617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42066049.

It is not an unprimeable number, because it can be changed into a prime (42066949) 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, 21712 + ... + 23569.

It is an arithmetic number, because the mean of its divisors is an integer number (10528065).

Almost surely, 2^42066049 is an apocalyptic number.

It is an amenable number.

42066049 is a deficient number, since it is larger than the sum of its proper divisors (46211).

42066049 is an equidigital number, since it uses as much as digits as its factorization.

42066049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46210.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 42066049 is about 6485.8344875583. The cubic root of 42066049 is about 347.7847818213.

The spelling of 42066049 in words is "forty-two million, sixty-six thousand, forty-nine".