42732905 has 16 divisors (see below), whose sum is σ = 52390800. Its totient is φ = 33454080.

The previous prime is 42732901. The next prime is 42732929. The reversal of 42732905 is 50923724.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4032064 + 38700841 = 2008^2 + 6221^2 .

It is not a de Polignac number, because 42732905 - 2² = 42732901 is a prime.

It is a super-2 number, since 2×42732905² = 3652202339478050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42732901) 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 15 ways as a sum of consecutive naturals, for example, 48065 + ... + 48945.

It is an arithmetic number, because the mean of its divisors is an integer number (3274425).

Almost surely, 2^42732905 is an apocalyptic number.

It is an amenable number.

42732905 is a deficient number, since it is larger than the sum of its proper divisors (9657895).

42732905 is a wasteful number, since it uses less digits than its factorization.

42732905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 42732905 is about 6537.0409972709. The cubic root of 42732905 is about 349.6129190060.

The spelling of 42732905 in words is "forty-two million, seven hundred thirty-two thousand, nine hundred five".