42290737 has 4 divisors (see below), whose sum is σ = 42329716. Its totient is φ = 42251760.

The previous prime is 42290723. The next prime is 42290761. The reversal of 42290737 is 73709224.

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 22363441 + 19927296 = 4729^2 + 4464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42290737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42290707) 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, 17814 + ... + 20047.

It is an arithmetic number, because the mean of its divisors is an integer number (10582429).

Almost surely, 2^42290737 is an apocalyptic number.

It is an amenable number.

42290737 is a deficient number, since it is larger than the sum of its proper divisors (38979).

42290737 is a wasteful number, since it uses less digits than its factorization.

42290737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38978.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 42290737 is about 6503.1328603989. The cubic root of 42290737 is about 348.4028919236.

The spelling of 42290737 in words is "forty-two million, two hundred ninety thousand, seven hundred thirty-seven".