138269145 has 64 divisors (see below), whose sum is σ = 264093696. Its totient is φ = 60445440.

The previous prime is 138269107. The next prime is 138269147. The reversal of 138269145 is 541962831.

It is not a de Polignac number, because 138269145 - 2⁷ = 138269017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138269147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 348087 + ... + 348483.

It is an arithmetic number, because the mean of its divisors is an integer number (4126464).

Almost surely, 2^138269145 is an apocalyptic number.

138269145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138269145 is a deficient number, since it is larger than the sum of its proper divisors (125824551).

138269145 is a wasteful number, since it uses less digits than its factorization.

138269145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its digits is 51840, while the sum is 39.

The square root of 138269145 is about 11758.7901163342. The cubic root of 138269145 is about 517.1006604380.

The spelling of 138269145 in words is "one hundred thirty-eight million, two hundred sixty-nine thousand, one hundred forty-five".