4921812 has 36 divisors (see below), whose sum is σ = 14219296. Its totient is φ = 1406160.

The previous prime is 4921811. The next prime is 4921841. The reversal of 4921812 is 2181294.

4921812 is nontrivially palindromic in base 5.

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

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

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4921811) 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 11 ways as a sum of consecutive naturals, for example, 9514 + ... + 10017.

Almost surely, 2^4921812 is an apocalyptic number.

4921812 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

4921812 is an abundant number, since it is smaller than the sum of its proper divisors (9297484).

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

4921812 is a wasteful number, since it uses less digits than its factorization.

4921812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19548 (or 19543 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 4921812 is about 2218.5157200254. The cubic root of 4921812 is about 170.1015771259.

It can be divided in two parts, 492 and 1812, that added together give a square (2304 = 48²).

The spelling of 4921812 in words is "four million, nine hundred twenty-one thousand, eight hundred twelve".