4272821 has 8 divisors (see below), whose sum is σ = 4906560. Its totient is φ = 3644928.

The previous prime is 4272811. The next prime is 4272833. The reversal of 4272821 is 1282724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4272821 - 2²² = 78517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4272811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245 + ... + 2933.

It is an arithmetic number, because the mean of its divisors is an integer number (613320).

Almost surely, 2^4272821 is an apocalyptic number.

It is an amenable number.

4272821 is a deficient number, since it is larger than the sum of its proper divisors (633739).

4272821 is a wasteful number, since it uses less digits than its factorization.

4272821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923.

The product of its digits is 1792, while the sum is 26.

The square root of 4272821 is about 2067.0803080674. The cubic root of 4272821 is about 162.2699988723.

The spelling of 4272821 in words is "four million, two hundred seventy-two thousand, eight hundred twenty-one".