4657421 has 4 divisors (see below), whose sum is σ = 4664700. Its totient is φ = 4650144.

The previous prime is 4657417. The next prime is 4657423. The reversal of 4657421 is 1247564.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2449225 + 2208196 = 1565^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 4657421 - 2² = 4657417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4657423) 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, 2576 + ... + 3993.

It is an arithmetic number, because the mean of its divisors is an integer number (1166175).

Almost surely, 2^4657421 is an apocalyptic number.

It is an amenable number.

4657421 is a deficient number, since it is larger than the sum of its proper divisors (7279).

4657421 is an equidigital number, since it uses as much as digits as its factorization.

4657421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278.

The product of its digits is 6720, while the sum is 29.

The square root of 4657421 is about 2158.1058824812. The cubic root of 4657421 is about 166.9994980085. Note that the first 3 decimals are identical.

The spelling of 4657421 in words is "four million, six hundred fifty-seven thousand, four hundred twenty-one".