5151921 has 12 divisors (see below), whose sum is σ = 7101936. Its totient is φ = 3321960.

The previous prime is 5151919. The next prime is 5151929. The reversal of 5151921 is 1291515.

5151921 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5151921 - 2¹ = 5151919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5151891 and 5151900.

It is not an unprimeable number, because it can be changed into a prime (5151929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1990 + ... + 3776.

It is an arithmetic number, because the mean of its divisors is an integer number (591828).

Almost surely, 2^5151921 is an apocalyptic number.

It is an amenable number.

5151921 is a deficient number, since it is larger than the sum of its proper divisors (1950015).

5151921 is a wasteful number, since it uses less digits than its factorization.

5151921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852 (or 1821 counting only the distinct ones).

The product of its digits is 450, while the sum is 24.

The square root of 5151921 is about 2269.7843509902. The cubic root of 5151921 is about 172.7122193798.

The spelling of 5151921 in words is "five million, one hundred fifty-one thousand, nine hundred twenty-one".