42287929 has 4 divisors (see below), whose sum is σ = 43430884. Its totient is φ = 41144976.

The previous prime is 42287923. The next prime is 42287941. The reversal of 42287929 is 92978224.

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 39879225 + 2408704 = 6315^2 + 1552^2 .

It is a cyclic number.

It is not a de Polignac number, because 42287929 - 2⁵ = 42287897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42287923) 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 3 ways as a sum of consecutive naturals, for example, 571422 + ... + 571495.

It is an arithmetic number, because the mean of its divisors is an integer number (10857721).

Almost surely, 2^42287929 is an apocalyptic number.

It is an amenable number.

42287929 is a deficient number, since it is larger than the sum of its proper divisors (1142955).

42287929 is a wasteful number, since it uses less digits than its factorization.

42287929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142954.

The product of its digits is 145152, while the sum is 43.

The square root of 42287929 is about 6502.9169608723. The cubic root of 42287929 is about 348.3951807237.

The spelling of 42287929 in words is "forty-two million, two hundred eighty-seven thousand, nine hundred twenty-nine".