138261267 has 24 divisors (see below), whose sum is σ = 208203216. Its totient is φ = 88330176.

The previous prime is 138261247. The next prime is 138261281. The reversal of 138261267 is 762162831.

138261267 is a `hidden beast` number, since 1 + 38 + 2 + 612 + 6 + 7 = 666.

138261267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138261267 - 2¹⁶ = 138195731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138261247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19213 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (8675134).

Almost surely, 2^138261267 is an apocalyptic number.

138261267 is the 7437-th heptagonal number.

138261267 is a deficient number, since it is larger than the sum of its proper divisors (69941949).

138261267 is a wasteful number, since it uses less digits than its factorization.

138261267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6307 (or 6304 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 138261267 is about 11758.4551281195. The cubic root of 138261267 is about 517.0908395042.

The spelling of 138261267 in words is "one hundred thirty-eight million, two hundred sixty-one thousand, two hundred sixty-seven".