4521780 has 36 divisors (see below), whose sum is σ = 13716612. Its totient is φ = 1205760.

The previous prime is 4521773. The next prime is 4521793. The reversal of 4521780 is 871254.

It can be written as a sum of positive squares in 2 ways, for example, as 1838736 + 2683044 = 1356^2 + 1638^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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, 12381 + ... + 12740.

It is an arithmetic number, because the mean of its divisors is an integer number (381017).

Almost surely, 2^4521780 is an apocalyptic number.

It is an amenable number.

4521780 is an abundant number, since it is smaller than the sum of its proper divisors (9194832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4521780 is a wasteful number, since it uses less digits than its factorization.

4521780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25136 (or 25131 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 4521780 is about 2126.4477421277. The cubic root of 4521780 is about 165.3622893411.

It can be divided in two parts, 45 and 21780, that multiplied together give a square (980100 = 990²).

The spelling of 4521780 in words is "four million, five hundred twenty-one thousand, seven hundred eighty".