42020115 has 32 divisors (see below), whose sum is σ = 72299520. Its totient is φ = 20772864.

The previous prime is 42020093. The next prime is 42020131. The reversal of 42020115 is 51102024.

It is not a de Polignac number, because 42020115 - 2¹² = 42016019 is a prime.

It is a super-2 number, since 2×42020115² = 3531380129226450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 42020094 and 42020103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11827 + ... + 14963.

It is an arithmetic number, because the mean of its divisors is an integer number (2259360).

Almost surely, 2^42020115 is an apocalyptic number.

42020115 is a deficient number, since it is larger than the sum of its proper divisors (30279405).

42020115 is a wasteful number, since it uses less digits than its factorization.

42020115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 42020115 is about 6482.2924185816. The cubic root of 42020115 is about 347.6581479146.

Adding to 42020115 its reverse (51102024), we get a palindrome (93122139).

The spelling of 42020115 in words is "forty-two million, twenty thousand, one hundred fifteen".