139268506 has 12 divisors (see below), whose sum is σ = 226208862. Its totient is φ = 64277616.

The previous prime is 139268453. The next prime is 139268509. The reversal of 139268506 is 605862931.

It can be written as a sum of positive squares in 3 ways, for example, as 113614281 + 25654225 = 10659^2 + 5065^2 .

It is not an unprimeable number, because it can be changed into a prime (139268509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205681 + ... + 206356.

Almost surely, 2^139268506 is an apocalyptic number.

139268506 is a deficient number, since it is larger than the sum of its proper divisors (86940356).

139268506 is a wasteful number, since it uses less digits than its factorization.

139268506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412065 (or 412052 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 139268506 is about 11801.2078195412. The cubic root of 139268506 is about 518.3434785588.

The spelling of 139268506 in words is "one hundred thirty-nine million, two hundred sixty-eight thousand, five hundred six".