4903721 has 4 divisors (see below), whose sum is σ = 5036292. Its totient is φ = 4771152.

The previous prime is 4903693. The next prime is 4903733. The reversal of 4903721 is 1273094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1273094 = 2 ⋅636547.

It can be written as a sum of positive squares in 2 ways, for example, as 3748096 + 1155625 = 1936^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 4903721 - 2²² = 709417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4903741) 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 3 ways as a sum of consecutive naturals, for example, 66230 + ... + 66303.

It is an arithmetic number, because the mean of its divisors is an integer number (1259073).

Almost surely, 2^4903721 is an apocalyptic number.

It is an amenable number.

4903721 is a deficient number, since it is larger than the sum of its proper divisors (132571).

4903721 is a wasteful number, since it uses less digits than its factorization.

4903721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132570.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 4903721 is about 2214.4346908410. The cubic root of 4903721 is about 169.8929083302.

The spelling of 4903721 in words is "four million, nine hundred three thousand, seven hundred twenty-one".