4278915 has 12 divisors (see below), whose sum is σ = 7416864. Its totient is φ = 2282064.

The previous prime is 4278893. The next prime is 4278931. The reversal of 4278915 is 5198724.

It is not a de Polignac number, because 4278915 - 2¹⁵ = 4246147 is a prime.

It is a super-2 number, since 2×4278915² = 36618227154450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4278915.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47499 + ... + 47588.

It is an arithmetic number, because the mean of its divisors is an integer number (618072).

Almost surely, 2^4278915 is an apocalyptic number.

4278915 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4278915 is a deficient number, since it is larger than the sum of its proper divisors (3137949).

4278915 is a wasteful number, since it uses less digits than its factorization.

4278915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95098 (or 95095 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 4278915 is about 2068.5538426640. The cubic root of 4278915 is about 162.3471066837.

The spelling of 4278915 in words is "four million, two hundred seventy-eight thousand, nine hundred fifteen".