4778257 has 4 divisors (see below), whose sum is σ = 5212656. Its totient is φ = 4343860.

The previous prime is 4778237. The next prime is 4778303. The reversal of 4778257 is 7528774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4778257 - 2⁷ = 4778129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4778237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217183 + ... + 217204.

It is an arithmetic number, because the mean of its divisors is an integer number (1303164).

Almost surely, 2^4778257 is an apocalyptic number.

It is an amenable number.

4778257 is a deficient number, since it is larger than the sum of its proper divisors (434399).

4778257 is a wasteful number, since it uses less digits than its factorization.

4778257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434398.

The product of its digits is 109760, while the sum is 40.

The square root of 4778257 is about 2185.9224597410. The cubic root of 4778257 is about 168.4314425522.

The spelling of 4778257 in words is "four million, seven hundred seventy-eight thousand, two hundred fifty-seven".