47251945 has 8 divisors (see below), whose sum is σ = 61064136. Its totient is φ = 34893696.

The previous prime is 47251943. The next prime is 47251987. The reversal of 47251945 is 54915274.

It can be written as a sum of positive squares in 4 ways, for example, as 725904 + 46526041 = 852^2 + 6821^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 47251945 - 2¹ = 47251943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47251943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363412 + ... + 363541.

It is an arithmetic number, because the mean of its divisors is an integer number (7633017).

Almost surely, 2^47251945 is an apocalyptic number.

It is an amenable number.

47251945 is a deficient number, since it is larger than the sum of its proper divisors (13812191).

47251945 is a wasteful number, since it uses less digits than its factorization.

47251945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726971.

The product of its digits is 50400, while the sum is 37.

The square root of 47251945 is about 6874.0050189100. The cubic root of 47251945 is about 361.5263001156.

It can be divided in two parts, 4725 and 1945, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 47251945 in words is "forty-seven million, two hundred fifty-one thousand, nine hundred forty-five".