138421085 has 32 divisors (see below), whose sum is σ = 187494912. Its totient is φ = 97231680.

The previous prime is 138421079. The next prime is 138421093. The reversal of 138421085 is 580124831.

It is not a de Polignac number, because 138421085 - 2⁴ = 138421069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252782 + ... + 253328.

It is an arithmetic number, because the mean of its divisors is an integer number (5859216).

Almost surely, 2^138421085 is an apocalyptic number.

It is an amenable number.

138421085 is a deficient number, since it is larger than the sum of its proper divisors (49073827).

138421085 is a wasteful number, since it uses less digits than its factorization.

138421085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 138421085 is about 11765.2490411381. The cubic root of 138421085 is about 517.2900001327.

The spelling of 138421085 in words is "one hundred thirty-eight million, four hundred twenty-one thousand, eighty-five".