138526545 has 8 divisors (see below), whose sum is σ = 221642496. Its totient is φ = 73880816.

The previous prime is 138526517. The next prime is 138526561. The reversal of 138526545 is 545625831.

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 138526545 - 2⁶ = 138526481 is a prime.

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, 4617537 + ... + 4617566.

It is an arithmetic number, because the mean of its divisors is an integer number (27705312).

Almost surely, 2^138526545 is an apocalyptic number.

138526545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138526545 is a deficient number, since it is larger than the sum of its proper divisors (83115951).

138526545 is an equidigital number, since it uses as much as digits as its factorization.

138526545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9235111.

The product of its digits is 144000, while the sum is 39.

The square root of 138526545 is about 11769.7300308886. The cubic root of 138526545 is about 517.4213374332.

The spelling of 138526545 in words is "one hundred thirty-eight million, five hundred twenty-six thousand, five hundred forty-five".