47542421 has 8 divisors (see below), whose sum is σ = 50802840. Its totient is φ = 44333568.

The previous prime is 47542399. The next prime is 47542457. The reversal of 47542421 is 12424574.

47542421 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 12567025 + 34975396 = 3545^2 + 5914^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47542421 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 (47542471) 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, 10976 + ... + 14681.

It is an arithmetic number, because the mean of its divisors is an integer number (6350355).

Almost surely, 2^47542421 is an apocalyptic number.

It is an amenable number.

47542421 is a deficient number, since it is larger than the sum of its proper divisors (3260419).

47542421 is a wasteful number, since it uses less digits than its factorization.

47542421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25783.

The product of its digits is 8960, while the sum is 29.

The square root of 47542421 is about 6895.1012320342. The cubic root of 47542421 is about 362.2656013004.

Adding to 47542421 its reverse (12424574), we get a palindrome (59966995).

The spelling of 47542421 in words is "forty-seven million, five hundred forty-two thousand, four hundred twenty-one".