138741485 has 4 divisors (see below), whose sum is σ = 166489788. Its totient is φ = 110993184.

The previous prime is 138741479. The next prime is 138741487. The reversal of 138741485 is 584147831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61811044 + 76930441 = 7862^2 + 8771^2 .

It is a cyclic number.

It is not a de Polignac number, because 138741485 - 2⁴ = 138741469 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 (138741487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13874144 + ... + 13874153.

It is an arithmetic number, because the mean of its divisors is an integer number (41622447).

Almost surely, 2^138741485 is an apocalyptic number.

It is an amenable number.

138741485 is a deficient number, since it is larger than the sum of its proper divisors (27748303).

138741485 is an equidigital number, since it uses as much as digits as its factorization.

138741485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27748302.

The product of its digits is 107520, while the sum is 41.

The square root of 138741485 is about 11778.8575422237. The cubic root of 138741485 is about 517.6888122123.

The spelling of 138741485 in words is "one hundred thirty-eight million, seven hundred forty-one thousand, four hundred eighty-five".