42820516 has 6 divisors (see below), whose sum is σ = 74935910. Its totient is φ = 21410256.

The previous prime is 42820513. The next prime is 42820537. The reversal of 42820516 is 61502824.

It can be written as a sum of positive squares in only one way, i.e., 41654116 + 1166400 = 6454^2 + 1080^2 .

It is not an unprimeable number, because it can be changed into a prime (42820513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5352561 + ... + 5352568.

Almost surely, 2^42820516 is an apocalyptic number.

It is an amenable number.

42820516 is a deficient number, since it is larger than the sum of its proper divisors (32115394).

42820516 is a wasteful number, since it uses less digits than its factorization.

42820516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10705133 (or 10705131 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 42820516 is about 6543.7386867142. The cubic root of 42820516 is about 349.8516813740.

The spelling of 42820516 in words is "forty-two million, eight hundred twenty thousand, five hundred sixteen".