138825751 has 8 divisors (see below), whose sum is σ = 139905920. Its totient is φ = 137750112.

The previous prime is 138825749. The next prime is 138825763. The reversal of 138825751 is 157528831.

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 138825751 - 2¹ = 138825749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138825851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82345 + ... + 84013.

It is an arithmetic number, because the mean of its divisors is an integer number (17488240).

Almost surely, 2^138825751 is an apocalyptic number.

138825751 is a deficient number, since it is larger than the sum of its proper divisors (1080169).

138825751 is a wasteful number, since it uses less digits than its factorization.

138825751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265.

The product of its digits is 67200, while the sum is 40.

The square root of 138825751 is about 11782.4340015126. The cubic root of 138825751 is about 517.7935987912.

The spelling of 138825751 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, seven hundred fifty-one".