47520421 has 8 divisors (see below), whose sum is σ = 51521400. Its totient is φ = 43568832.

The previous prime is 47520413. The next prime is 47520437. The reversal of 47520421 is 12402574.

47520421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5452225 + 42068196 = 2335^2 + 6486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47520421 - 2³ = 47520413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47520401) 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 7 ways as a sum of consecutive naturals, for example, 10330 + ... + 14203.

It is an arithmetic number, because the mean of its divisors is an integer number (6440175).

Almost surely, 2^47520421 is an apocalyptic number.

It is an amenable number.

47520421 is a deficient number, since it is larger than the sum of its proper divisors (4000979).

47520421 is a wasteful number, since it uses less digits than its factorization.

47520421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24695.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 47520421 is about 6893.5057119002. The cubic root of 47520421 is about 362.2097138585.

Adding to 47520421 its reverse (12402574), we get a palindrome (59922995).

The spelling of 47520421 in words is "forty-seven million, five hundred twenty thousand, four hundred twenty-one".