52138745 has 32 divisors (see below), whose sum is σ = 70004736. Its totient is φ = 37094400.

The previous prime is 52138741. The next prime is 52138753. The reversal of 52138745 is 54783125.

It is a happy number.

It is not a de Polignac number, because 52138745 - 2² = 52138741 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52138741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123635 + ... + 124055.

It is an arithmetic number, because the mean of its divisors is an integer number (2187648).

Almost surely, 2^52138745 is an apocalyptic number.

It is an amenable number.

52138745 is a deficient number, since it is larger than the sum of its proper divisors (17865991).

52138745 is a wasteful number, since it uses less digits than its factorization.

52138745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its digits is 33600, while the sum is 35.

The square root of 52138745 is about 7220.7163772025. The cubic root of 52138745 is about 373.5827870634.

The spelling of 52138745 in words is "fifty-two million, one hundred thirty-eight thousand, seven hundred forty-five".