42090737 has 8 divisors (see below), whose sum is σ = 45424680. Its totient is φ = 38770560.

The previous prime is 42090733. The next prime is 42090739. The reversal of 42090737 is 73709024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2262016 + 39828721 = 1504^2 + 6311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42090737 - 2² = 42090733 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42090731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3437 + ... + 9797.

It is an arithmetic number, because the mean of its divisors is an integer number (5678085).

Almost surely, 2^42090737 is an apocalyptic number.

It is an amenable number.

42090737 is a deficient number, since it is larger than the sum of its proper divisors (3333943).

42090737 is a wasteful number, since it uses less digits than its factorization.

42090737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6883.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 42090737 is about 6487.7374330347. The cubic root of 42090737 is about 347.8528052571.

The spelling of 42090737 in words is "forty-two million, ninety thousand, seven hundred thirty-seven".