42700015 has 4 divisors (see below), whose sum is σ = 51240024. Its totient is φ = 34160008.

The previous prime is 42699997. The next prime is 42700037. The reversal of 42700015 is 51000724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42700015 - 2¹⁷ = 42568943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42699965 and 42700001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4269997 + ... + 4270006.

It is an arithmetic number, because the mean of its divisors is an integer number (12810006).

Almost surely, 2^42700015 is an apocalyptic number.

42700015 is a deficient number, since it is larger than the sum of its proper divisors (8540009).

42700015 is an equidigital number, since it uses as much as digits as its factorization.

42700015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540008.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 42700015 is about 6534.5248488318. The cubic root of 42700015 is about 349.5232011003.

Adding to 42700015 its reverse (51000724), we get a palindrome (93700739).

The spelling of 42700015 in words is "forty-two million, seven hundred thousand, fifteen".