139506501 has 16 divisors (see below), whose sum is σ = 192816000. Its totient is φ = 89613888.

The previous prime is 139506487. The next prime is 139506517. The reversal of 139506501 is 105605931.

It is not a de Polignac number, because 139506501 - 2⁷ = 139506373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139506001) 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 15 ways as a sum of consecutive naturals, for example, 50775 + ... + 53451.

It is an arithmetic number, because the mean of its divisors is an integer number (12051000).

Almost surely, 2^139506501 is an apocalyptic number.

It is an amenable number.

139506501 is a deficient number, since it is larger than the sum of its proper divisors (53309499).

139506501 is a wasteful number, since it uses less digits than its factorization.

139506501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 139506501 is about 11811.2870170867. The cubic root of 139506501 is about 518.6385750714.

The spelling of 139506501 in words is "one hundred thirty-nine million, five hundred six thousand, five hundred one".