139025449 has 4 divisors (see below), whose sum is σ = 143819460. Its totient is φ = 134231440.

The previous prime is 139025443. The next prime is 139025479. The reversal of 139025449 is 944520931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78854400 + 60171049 = 8880^2 + 7757^2 .

It is a cyclic number.

It is not a de Polignac number, because 139025449 - 2¹³ = 139017257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139025443) by changing a digit.

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, 2396962 + ... + 2397019.

It is an arithmetic number, because the mean of its divisors is an integer number (35954865).

Almost surely, 2^139025449 is an apocalyptic number.

It is an amenable number.

139025449 is a deficient number, since it is larger than the sum of its proper divisors (4794011).

139025449 is an equidigital number, since it uses as much as digits as its factorization.

139025449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794010.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 139025449 is about 11790.9053511594. The cubic root of 139025449 is about 518.0417583346.

The spelling of 139025449 in words is "one hundred thirty-nine million, twenty-five thousand, four hundred forty-nine".