139152529 has 4 divisors (see below), whose sum is σ = 141433780. Its totient is φ = 136871280.

The previous prime is 139152491. The next prime is 139152547. The reversal of 139152529 is 925251931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 925251931 = 29 ⋅31905239.

It can be written as a sum of positive squares in 2 ways, for example, as 79121025 + 60031504 = 8895^2 + 7748^2 .

It is a cyclic number.

It is not a de Polignac number, because 139152529 - 2¹¹ = 139150481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139152569) 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 3 ways as a sum of consecutive naturals, for example, 1140534 + ... + 1140655.

It is an arithmetic number, because the mean of its divisors is an integer number (35358445).

Almost surely, 2^139152529 is an apocalyptic number.

It is an amenable number.

139152529 is a deficient number, since it is larger than the sum of its proper divisors (2281251).

139152529 is an equidigital number, since it uses as much as digits as its factorization.

139152529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281250.

The product of its digits is 24300, while the sum is 37.

The square root of 139152529 is about 11796.2930194193. The cubic root of 139152529 is about 518.1995536605.

The spelling of 139152529 in words is "one hundred thirty-nine million, one hundred fifty-two thousand, five hundred twenty-nine".