138953142 has 24 divisors (see below), whose sum is σ = 306170280. Its totient is φ = 45532320.

The previous prime is 138953131. The next prime is 138953159. The reversal of 138953142 is 241359831.

138953142 is a `hidden beast` number, since 1 + 3 + 89 + 531 + 42 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 138953097 and 138953106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64359 + ... + 66482.

It is an arithmetic number, because the mean of its divisors is an integer number (12757095).

Almost surely, 2^138953142 is an apocalyptic number.

138953142 is an abundant number, since it is smaller than the sum of its proper divisors (167217138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138953142 is a wasteful number, since it uses less digits than its factorization.

138953142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130908 (or 130905 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 138953142 is about 11787.8387332030. The cubic root of 138953142 is about 517.9519317560.

The spelling of 138953142 in words is "one hundred thirty-eight million, nine hundred fifty-three thousand, one hundred forty-two".