42564705 has 32 divisors (see below), whose sum is σ = 70778880. Its totient is φ = 21819840.

The previous prime is 42564703. The next prime is 42564757. The reversal of 42564705 is 50746524.

It is not a de Polignac number, because 42564705 - 2¹ = 42564703 is a prime.

It is a super-2 number, since 2×42564705² = 3623508223474050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42564701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110944 + ... + 111326.

It is an arithmetic number, because the mean of its divisors is an integer number (2211840).

Almost surely, 2^42564705 is an apocalyptic number.

It is an amenable number.

42564705 is a deficient number, since it is larger than the sum of its proper divisors (28214175).

42564705 is a wasteful number, since it uses less digits than its factorization.

42564705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 42564705 is about 6524.1631647285. The cubic root of 42564705 is about 349.1536147481.

The spelling of 42564705 in words is "forty-two million, five hundred sixty-four thousand, seven hundred five".