47430121 has 4 divisors (see below), whose sum is σ = 47614932. Its totient is φ = 47245312.

The previous prime is 47430113. The next prime is 47430169. The reversal of 47430121 is 12103474.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46389721 + 1040400 = 6811^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 47430121 - 2³ = 47430113 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47430092 and 47430101.

It is not an unprimeable number, because it can be changed into a prime (47430181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92020 + ... + 92533.

It is an arithmetic number, because the mean of its divisors is an integer number (11903733).

Almost surely, 2^47430121 is an apocalyptic number.

It is an amenable number.

47430121 is a deficient number, since it is larger than the sum of its proper divisors (184811).

47430121 is a wasteful number, since it uses less digits than its factorization.

47430121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184810.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 47430121 is about 6886.9529546818. The cubic root of 47430121 is about 361.9801404406.

Adding to 47430121 its reverse (12103474), we get a palindrome (59533595).

The spelling of 47430121 in words is "forty-seven million, four hundred thirty thousand, one hundred twenty-one".