138726455 has 16 divisors (see below), whose sum is σ = 198526464. Its totient is φ = 90990240.

The previous prime is 138726439. The next prime is 138726473. The reversal of 138726455 is 554627831.

It is not a de Polignac number, because 138726455 - 2⁴ = 138726439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85361 + ... + 86970.

It is an arithmetic number, because the mean of its divisors is an integer number (12407904).

Almost surely, 2^138726455 is an apocalyptic number.

138726455 is a deficient number, since it is larger than the sum of its proper divisors (59800009).

138726455 is a wasteful number, since it uses less digits than its factorization.

138726455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172366.

The product of its digits is 201600, while the sum is 41.

The square root of 138726455 is about 11778.2195173974. The cubic root of 138726455 is about 517.6701176264.

The spelling of 138726455 in words is "one hundred thirty-eight million, seven hundred twenty-six thousand, four hundred fifty-five".