4247878 has 4 divisors (see below), whose sum is σ = 6371820. Its totient is φ = 2123938.

The previous prime is 4247863. The next prime is 4247917. The reversal of 4247878 is 8787424.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 4247878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061968 + ... + 1061971.

It is an arithmetic number, because the mean of its divisors is an integer number (1592955).

Almost surely, 2^4247878 is an apocalyptic number.

4247878 is a deficient number, since it is larger than the sum of its proper divisors (2123942).

4247878 is a wasteful number, since it uses less digits than its factorization.

4247878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123941.

The product of its digits is 100352, while the sum is 40.

The square root of 4247878 is about 2061.0380879547. The cubic root of 4247878 is about 161.9536269239.

The spelling of 4247878 in words is "four million, two hundred forty-seven thousand, eight hundred seventy-eight".