4536021 has 16 divisors (see below), whose sum is σ = 7027328. Its totient is φ = 2548800.

The previous prime is 4536019. The next prime is 4536023. The reversal of 4536021 is 1206354.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4536019) and next prime (4536023).

It is not a de Polignac number, because 4536021 - 2¹ = 4536019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4536023) 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, 490 + ... + 3051.

It is an arithmetic number, because the mean of its divisors is an integer number (439208).

Almost surely, 2^4536021 is an apocalyptic number.

It is an amenable number.

4536021 is a deficient number, since it is larger than the sum of its proper divisors (2491307).

4536021 is a wasteful number, since it uses less digits than its factorization.

4536021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 4536021 is about 2129.7936519766. The cubic root of 4536021 is about 165.5357060384.

The spelling of 4536021 in words is "four million, five hundred thirty-six thousand, twenty-one".