138412546 has 4 divisors (see below), whose sum is σ = 207618822. Its totient is φ = 69206272.

The previous prime is 138412541. The next prime is 138412577. The reversal of 138412546 is 645214831.

138412546 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645214831 = 12373 ⋅52147.

It can be written as a sum of positive squares in only one way, i.e., 102232321 + 36180225 = 10111^2 + 6015^2 .

It is not an unprimeable number, because it can be changed into a prime (138412541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34603135 + ... + 34603138.

Almost surely, 2^138412546 is an apocalyptic number.

138412546 is a deficient number, since it is larger than the sum of its proper divisors (69206276).

138412546 is an equidigital number, since it uses as much as digits as its factorization.

138412546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69206275.

The product of its digits is 23040, while the sum is 34.

The square root of 138412546 is about 11764.8861447955. The cubic root of 138412546 is about 517.2793629523.

The spelling of 138412546 in words is "one hundred thirty-eight million, four hundred twelve thousand, five hundred forty-six".