139885285 has 8 divisors (see below), whose sum is σ = 171029880. Its totient is φ = 109796544.

The previous prime is 139885279. The next prime is 139885289. The reversal of 139885285 is 582588931.

It can be written as a sum of positive squares in 4 ways, for example, as 9400356 + 130484929 = 3066^2 + 11423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139885285 - 2⁷ = 139885157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139885289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263670 + ... + 264199.

It is an arithmetic number, because the mean of its divisors is an integer number (21378735).

Almost surely, 2^139885285 is an apocalyptic number.

It is an amenable number.

139885285 is a deficient number, since it is larger than the sum of its proper divisors (31144595).

139885285 is an equidigital number, since it uses as much as digits as its factorization.

139885285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527927.

The product of its digits is 691200, while the sum is 49.

The square root of 139885285 is about 11827.3109792548. The cubic root of 139885285 is about 519.1075483453.

The spelling of 139885285 in words is "one hundred thirty-nine million, eight hundred eighty-five thousand, two hundred eighty-five".