139720255 has 16 divisors (see below), whose sum is σ = 174875904. Its totient is φ = 107043840.

The previous prime is 139720253. The next prime is 139720303. The reversal of 139720255 is 552027931.

It is not a de Polignac number, because 139720255 - 2¹ = 139720253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139720255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139720253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10389 + ... + 19681.

It is an arithmetic number, because the mean of its divisors is an integer number (10929744).

Almost surely, 2^139720255 is an apocalyptic number.

139720255 is a deficient number, since it is larger than the sum of its proper divisors (35155649).

139720255 is an equidigital number, since it uses as much as digits as its factorization.

139720255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 139720255 is about 11820.3322711335. The cubic root of 139720255 is about 518.9033285568.

The spelling of 139720255 in words is "one hundred thirty-nine million, seven hundred twenty thousand, two hundred fifty-five".