47421252 has 18 divisors (see below), whose sum is σ = 119870478. Its totient is φ = 15807072.

The previous prime is 47421233. The next prime is 47421259. The reversal of 47421252 is 25212474.

47421252 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 only one way, i.e., 46867716 + 553536 = 6846^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (47421259) 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 5 ways as a sum of consecutive naturals, for example, 658593 + ... + 658664.

It is an arithmetic number, because the mean of its divisors is an integer number (6659471).

Almost surely, 2^47421252 is an apocalyptic number.

It is an amenable number.

47421252 is an abundant number, since it is smaller than the sum of its proper divisors (72449226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47421252 is a wasteful number, since it uses less digits than its factorization.

47421252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317267 (or 1317262 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 47421252 is about 6886.3090258861. The cubic root of 47421252 is about 361.9575767059.

The spelling of 47421252 in words is "forty-seven million, four hundred twenty-one thousand, two hundred fifty-two".