4526021 has 4 divisors (see below), whose sum is σ = 4553952. Its totient is φ = 4498092.

The previous prime is 4526003. The next prime is 4526033. The reversal of 4526021 is 1206254.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-4526021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4525984 and 4526002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4526521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13721 + ... + 14046.

It is an arithmetic number, because the mean of its divisors is an integer number (1138488).

Almost surely, 2^4526021 is an apocalyptic number.

It is an amenable number.

4526021 is a deficient number, since it is larger than the sum of its proper divisors (27931).

4526021 is a wasteful number, since it uses less digits than its factorization.

4526021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27930.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 4526021 is about 2127.4447113850. Note that the first 3 decimals coincide. The cubic root of 4526021 is about 165.4139712253.

The spelling of 4526021 in words is "four million, five hundred twenty-six thousand, twenty-one".