4220657 has 4 divisors (see below), whose sum is σ = 4823616. Its totient is φ = 3617700.

The previous prime is 4220653. The next prime is 4220659. The reversal of 4220657 is 7560224.

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 4220657 - 2² = 4220653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4220653) 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, 301469 + ... + 301482.

It is an arithmetic number, because the mean of its divisors is an integer number (1205904).

Almost surely, 2^4220657 is an apocalyptic number.

It is an amenable number.

4220657 is a deficient number, since it is larger than the sum of its proper divisors (602959).

4220657 is an equidigital number, since it uses as much as digits as its factorization.

4220657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602958.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 4220657 is about 2054.4237634918. The cubic root of 4220657 is about 161.6069447927.

The spelling of 4220657 in words is "four million, two hundred twenty thousand, six hundred fifty-seven".