138825145 has 8 divisors (see below), whose sum is σ = 176389704. Its totient is φ = 104527104.

The previous prime is 138825131. The next prime is 138825157. The reversal of 138825145 is 541528831.

It can be written as a sum of positive squares in 4 ways, for example, as 1279161 + 137545984 = 1131^2 + 11728^2 .

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 138825145 - 2⁹ = 138824633 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 7 ways as a sum of consecutive naturals, for example, 816534 + ... + 816703.

It is an arithmetic number, because the mean of its divisors is an integer number (22048713).

Almost surely, 2^138825145 is an apocalyptic number.

It is an amenable number.

138825145 is a deficient number, since it is larger than the sum of its proper divisors (37564559).

138825145 is a wasteful number, since it uses less digits than its factorization.

138825145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633259.

The product of its digits is 38400, while the sum is 37.

The square root of 138825145 is about 11782.4082852361. The cubic root of 138825145 is about 517.7928453686.

The spelling of 138825145 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, one hundred forty-five".