4997021 has 4 divisors (see below), whose sum is σ = 5003292. Its totient is φ = 4990752.

The previous prime is 4997017. The next prime is 4997029. The reversal of 4997021 is 1207994.

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 2937796 + 2059225 = 1714^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 4997021 - 2² = 4997017 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 (4997029) 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, 1730 + ... + 3603.

It is an arithmetic number, because the mean of its divisors is an integer number (1250823).

Almost surely, 2^4997021 is an apocalyptic number.

It is an amenable number.

4997021 is a deficient number, since it is larger than the sum of its proper divisors (6271).

4997021 is an equidigital number, since it uses as much as digits as its factorization.

4997021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 4997021 is about 2235.4017536005. The cubic root of 4997021 is about 170.9636277987.

The spelling of 4997021 in words is "four million, nine hundred ninety-seven thousand, twenty-one".