47139425 has 6 divisors (see below), whose sum is σ = 58452918. Its totient is φ = 37711520.

The previous prime is 47139403. The next prime is 47139431. The reversal of 47139425 is 52493174.

47139425 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 3 ways, for example, as 134689 + 47004736 = 367^2 + 6856^2 .

It is not a de Polignac number, because 47139425 - 2¹² = 47135329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 942764 + ... + 942813.

It is an arithmetic number, because the mean of its divisors is an integer number (9742153).

Almost surely, 2^47139425 is an apocalyptic number.

It is an amenable number.

47139425 is a deficient number, since it is larger than the sum of its proper divisors (11313493).

47139425 is a wasteful number, since it uses less digits than its factorization.

47139425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885587 (or 1885582 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 47139425 is about 6865.8156835150. The cubic root of 47139425 is about 361.2391072014.

It can be divided in two parts, 4713 and 9425, that multiplied together give a triangular number (44420025 = T₉₄₂₅).

The spelling of 47139425 in words is "forty-seven million, one hundred thirty-nine thousand, four hundred twenty-five".