138254765 has 8 divisors (see below), whose sum is σ = 180988128. Its totient is φ = 100548880.

The previous prime is 138254749. The next prime is 138254789. The reversal of 138254765 is 567452831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138254765 - 2⁴ = 138254749 is a prime.

It is a super-2 number, since 2×138254765² = 38228760090410450, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1256807 + ... + 1256916.

It is an arithmetic number, because the mean of its divisors is an integer number (22623516).

Almost surely, 2^138254765 is an apocalyptic number.

It is an amenable number.

138254765 is a deficient number, since it is larger than the sum of its proper divisors (42733363).

138254765 is a wasteful number, since it uses less digits than its factorization.

138254765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513739.

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

The square root of 138254765 is about 11758.1786429702. The cubic root of 138254765 is about 517.0827336492.

The spelling of 138254765 in words is "one hundred thirty-eight million, two hundred fifty-four thousand, seven hundred sixty-five".