4971021 has 16 divisors (see below), whose sum is σ = 7656768. Its totient is φ = 2835200.

The previous prime is 4971019. The next prime is 4971023. The reversal of 4971021 is 1201794.

4971021 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4971019) and next prime (4971023).

It is a cyclic number.

It is not a de Polignac number, because 4971021 - 2¹ = 4971019 is a prime.

It is a super-2 number, since 2×4971021² = 49422099564882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4970982 and 4971000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4971023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3870 + ... + 4991.

It is an arithmetic number, because the mean of its divisors is an integer number (478548).

Almost surely, 2^4971021 is an apocalyptic number.

It is an amenable number.

4971021 is a deficient number, since it is larger than the sum of its proper divisors (2685747).

4971021 is a wasteful number, since it uses less digits than its factorization.

4971021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 4971021 is about 2229.5786597472. The cubic root of 4971021 is about 170.6665984259. Note that the first 3 decimals are identical.

The spelling of 4971021 in words is "four million, nine hundred seventy-one thousand, twenty-one".