47071421 has 4 divisors (see below), whose sum is σ = 47196000. Its totient is φ = 46946844.

The previous prime is 47071391. The next prime is 47071429. The reversal of 47071421 is 12417074.

47071421 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12417074 = 2 ⋅6208537.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47071421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47071429) 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, 61721 + ... + 62478.

It is an arithmetic number, because the mean of its divisors is an integer number (11799000).

Almost surely, 2^47071421 is an apocalyptic number.

It is an amenable number.

47071421 is a deficient number, since it is larger than the sum of its proper divisors (124579).

47071421 is a wasteful number, since it uses less digits than its factorization.

47071421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124578.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 47071421 is about 6860.8615348220. The cubic root of 47071421 is about 361.0653140571.

Adding to 47071421 its reverse (12417074), we get a palindrome (59488495).

The spelling of 47071421 in words is "forty-seven million, seventy-one thousand, four hundred twenty-one".