139042445 has 8 divisors (see below), whose sum is σ = 166923744. Its totient is φ = 111185424.

The previous prime is 139042441. The next prime is 139042447. The reversal of 139042445 is 544240931.

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 139042445 - 2² = 139042441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139042441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10802 + ... + 19868.

It is an arithmetic number, because the mean of its divisors is an integer number (20865468).

Almost surely, 2^139042445 is an apocalyptic number.

It is an amenable number.

139042445 is a deficient number, since it is larger than the sum of its proper divisors (27881299).

139042445 is an equidigital number, since it uses as much as digits as its factorization.

139042445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12139.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 139042445 is about 11791.6260541115. The cubic root of 139042445 is about 518.0628678485.

The spelling of 139042445 in words is "one hundred thirty-nine million, forty-two thousand, four hundred forty-five".