139409075 has 12 divisors (see below), whose sum is σ = 186165168. Its totient is φ = 102948000.

The previous prime is 139409069. The next prime is 139409131. The reversal of 139409075 is 570904931.

It is a happy number.

It is not a de Polignac number, because 139409075 - 2⁴ = 139409059 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214151 + ... + 214800.

It is an arithmetic number, because the mean of its divisors is an integer number (15513764).

Almost surely, 2^139409075 is an apocalyptic number.

139409075 is a deficient number, since it is larger than the sum of its proper divisors (46756093).

139409075 is a wasteful number, since it uses less digits than its factorization.

139409075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428974 (or 428969 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 139409075 is about 11807.1620214173. The cubic root of 139409075 is about 518.5178145131.

The spelling of 139409075 in words is "one hundred thirty-nine million, four hundred nine thousand, seventy-five".