47082121 has 4 divisors (see below), whose sum is σ = 47105044. Its totient is φ = 47059200.

The previous prime is 47082107. The next prime is 47082131. The reversal of 47082121 is 12128074.

It is a happy number.

47082121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 17106496 + 29975625 = 4136^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 47082121 - 2¹⁷ = 46951049 is a prime.

It is a super-2 number, since 2×47082121² = 4433452235717282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47082131) 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, 8040 + ... + 12601.

It is an arithmetic number, because the mean of its divisors is an integer number (11776261).

Almost surely, 2^47082121 is an apocalyptic number.

It is an amenable number.

47082121 is a deficient number, since it is larger than the sum of its proper divisors (22923).

47082121 is a wasteful number, since it uses less digits than its factorization.

47082121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22922.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 47082121 is about 6861.6412759631. The cubic root of 47082121 is about 361.0926704026.

The spelling of 47082121 in words is "forty-seven million, eighty-two thousand, one hundred twenty-one".