4921555 has 12 divisors (see below), whose sum is σ = 6078240. Its totient is φ = 3825504.

The previous prime is 4921549. The next prime is 4921577. The reversal of 4921555 is 5551294.

It is not a de Polignac number, because 4921555 - 2⁵ = 4921523 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 6486 + ... + 7204.

It is an arithmetic number, because the mean of its divisors is an integer number (506520).

Almost surely, 2^4921555 is an apocalyptic number.

4921555 is a deficient number, since it is larger than the sum of its proper divisors (1156685).

4921555 is an equidigital number, since it uses as much as digits as its factorization.

4921555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 761 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 4921555 is about 2218.4577976603. The cubic root of 4921555 is about 170.0986163690.

It can be divided in two parts, 4921 and 555, that added together give a square (5476 = 74²).

The spelling of 4921555 in words is "four million, nine hundred twenty-one thousand, five hundred fifty-five".