4242778 has 4 divisors (see below), whose sum is σ = 6364170. Its totient is φ = 2121388.

The previous prime is 4242761. The next prime is 4242781. The reversal of 4242778 is 8772424.

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

It can be written as a sum of positive squares in only one way, i.e., 2712609 + 1530169 = 1647^2 + 1237^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060693 + ... + 1060696.

Almost surely, 2^4242778 is an apocalyptic number.

4242778 is a deficient number, since it is larger than the sum of its proper divisors (2121392).

4242778 is a wasteful number, since it uses less digits than its factorization.

4242778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121391.

The product of its digits is 25088, while the sum is 34.

The square root of 4242778 is about 2059.8004757743. The cubic root of 4242778 is about 161.8887871562. Note that the first 3 decimals are identical.

The spelling of 4242778 in words is "four million, two hundred forty-two thousand, seven hundred seventy-eight".