4521890 has 24 divisors (see below), whose sum is σ = 8373780. Its totient is φ = 1758080.

The previous prime is 4521889. The next prime is 4521893. The reversal of 4521890 is 981254.

It can be written as a sum of positive squares in 6 ways, for example, as 57121 + 4464769 = 239^2 + 2113^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (4521893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16676 + ... + 16944.

Almost surely, 2^4521890 is an apocalyptic number.

4521890 is a deficient number, since it is larger than the sum of its proper divisors (3851890).

4521890 is a wasteful number, since it uses less digits than its factorization.

4521890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 4521890 is about 2126.4736067020. The cubic root of 4521890 is about 165.3636302367.

The spelling of 4521890 in words is "four million, five hundred twenty-one thousand, eight hundred ninety".