138248045 has 8 divisors (see below), whose sum is σ = 178659096. Its totient is φ = 102090816.

The previous prime is 138248027. The next prime is 138248059. The reversal of 138248045 is 540842831.

It can be written as a sum of positive squares in 4 ways, for example, as 16410601 + 121837444 = 4051^2 + 11038^2 .

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 138248045 - 2²⁶ = 71139181 is a prime.

It is a super-2 number, since 2×138248045² = 38225043892644050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138247996 and 138248014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063382 + ... + 1063511.

It is an arithmetic number, because the mean of its divisors is an integer number (22332387).

Almost surely, 2^138248045 is an apocalyptic number.

It is an amenable number.

138248045 is a deficient number, since it is larger than the sum of its proper divisors (40411051).

138248045 is a wasteful number, since it uses less digits than its factorization.

138248045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126911.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 138248045 is about 11757.8928809545. The cubic root of 138248045 is about 517.0743557528.

The spelling of 138248045 in words is "one hundred thirty-eight million, two hundred forty-eight thousand, forty-five".