138951 has 6 divisors (see below), whose sum is σ = 200720. Its totient is φ = 92628.

The previous prime is 138937. The next prime is 138959. The reversal of 138951 is 159831.

It is not a de Polignac number, because 138951 - 2¹⁰ = 137927 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 (138959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7711 + ... + 7728.

2¹³⁸⁹⁵¹ is an apocalyptic number.

138951 is a deficient number, since it is larger than the sum of its proper divisors (61769).

138951 is a wasteful number, since it uses less digits than its factorization.

138951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15445 (or 15442 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 138951 is about 372.7613177356. The cubic root of 138951 is about 51.7949270286.

It can be divided in two parts, 138 and 951, that added together give a square (1089 = 33²).

The spelling of 138951 in words is "one hundred thirty-eight thousand, nine hundred fifty-one".