49287421 has 4 divisors (see below), whose sum is σ = 49301500. Its totient is φ = 49273344.

The previous prime is 49287401. The next prime is 49287431. The reversal of 49287421 is 12478294.

49287421 is digitally balanced in base 2, 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 27562500 = 4661^2 + 5250^2 .

It is a cyclic number.

It is not a de Polignac number, because 49287421 - 2¹⁹ = 48763133 is a prime.

It is the 7021-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49287401) by changing a digit.

It is a nontrivial repunit in base 7020.

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, 2755 + ... + 10303.

It is an arithmetic number, because the mean of its divisors is an integer number (12325375).

Almost surely, 2^49287421 is an apocalyptic number.

It is an amenable number.

49287421 is a deficient number, since it is larger than the sum of its proper divisors (14079).

49287421 is an equidigital number, since it uses as much as digits as its factorization.

49287421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14078.

The product of its digits is 32256, while the sum is 37.

The square root of 49287421 is about 7020.5000534150. The cubic root of 49287421 is about 366.6446604791.

The spelling of 49287421 in words is "forty-nine million, two hundred eighty-seven thousand, four hundred twenty-one".