5121903 has 4 divisors (see below), whose sum is σ = 6829208. Its totient is φ = 3414600.

The previous prime is 5121901. The next prime is 5121911. The reversal of 5121903 is 3091215.

5121903 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5121903 - 2¹ = 5121901 is a prime.

It is a D-number.

It is a Duffinian number.

5121903 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5121903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853648 + ... + 853653.

It is an arithmetic number, because the mean of its divisors is an integer number (1707302).

Almost surely, 2^5121903 is an apocalyptic number.

5121903 is a deficient number, since it is larger than the sum of its proper divisors (1707305).

5121903 is a wasteful number, since it uses less digits than its factorization.

5121903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707304.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 5121903 is about 2263.1621682946. The cubic root of 5121903 is about 172.3761261472.

It can be divided in two parts, 512 and 1903, that added together give a triangular number (2415 = T₆₉).

The spelling of 5121903 in words is "five million, one hundred twenty-one thousand, nine hundred three".