5421851 has 4 divisors (see below), whose sum is σ = 5443704. Its totient is φ = 5400000.

The previous prime is 5421839. The next prime is 5421887. The reversal of 5421851 is 1581245.

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

It is a cyclic number.

It is not a de Polignac number, because 5421851 - 2¹⁰ = 5420827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5421851.

It is not an unprimeable number, because it can be changed into a prime (5421151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10550 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (1360926).

Almost surely, 2^5421851 is an apocalyptic number.

5421851 is a deficient number, since it is larger than the sum of its proper divisors (21853).

5421851 is a wasteful number, since it uses less digits than its factorization.

5421851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21852.

The product of its digits is 1600, while the sum is 26.

The square root of 5421851 is about 2328.4868477189. The cubic root of 5421851 is about 175.6773854950.

Subtracting from 5421851 its reverse (1581245), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5421851 in words is "five million, four hundred twenty-one thousand, eight hundred fifty-one".