138537245 has 16 divisors (see below), whose sum is σ = 207266688. Its totient is φ = 86360640.

The previous prime is 138537241. The next prime is 138537281. The reversal of 138537245 is 542735831.

It is not a de Polignac number, because 138537245 - 2² = 138537241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138537199 and 138537208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138537241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179534 + ... + 180303.

It is an arithmetic number, because the mean of its divisors is an integer number (12954168).

Almost surely, 2^138537245 is an apocalyptic number.

It is an amenable number.

138537245 is a deficient number, since it is larger than the sum of its proper divisors (68729443).

138537245 is a wasteful number, since it uses less digits than its factorization.

138537245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359860.

The product of its digits is 100800, while the sum is 38.

The square root of 138537245 is about 11770.1845779920. The cubic root of 138537245 is about 517.4346592260.

The spelling of 138537245 in words is "one hundred thirty-eight million, five hundred thirty-seven thousand, two hundred forty-five".