139145485 has 4 divisors (see below), whose sum is σ = 166974588. Its totient is φ = 111316384.

The previous prime is 139145477. The next prime is 139145491. The reversal of 139145485 is 584541931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584541931 = 2251 ⋅259681.

It can be written as a sum of positive squares in 2 ways, for example, as 38303721 + 100841764 = 6189^2 + 10042^2 .

It is a cyclic number.

It is not a de Polignac number, because 139145485 - 2³ = 139145477 is a prime.

It is a super-2 number, since 2×139145485² = 38722931991770450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 13914544 + ... + 13914553.

It is an arithmetic number, because the mean of its divisors is an integer number (41743647).

Almost surely, 2^139145485 is an apocalyptic number.

It is an amenable number.

139145485 is a deficient number, since it is larger than the sum of its proper divisors (27829103).

139145485 is an equidigital number, since it uses as much as digits as its factorization.

139145485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27829102.

The product of its digits is 86400, while the sum is 40.

The square root of 139145485 is about 11795.9944472690. The cubic root of 139145485 is about 518.1908096363.

The spelling of 139145485 in words is "one hundred thirty-nine million, one hundred forty-five thousand, four hundred eighty-five".