138704425 has 6 divisors (see below), whose sum is σ = 171993518. Its totient is φ = 110963520.

The previous prime is 138704407. The next prime is 138704429. The reversal of 138704425 is 524407831.

It can be written as a sum of positive squares in 3 ways, for example, as 10810944 + 127893481 = 3288^2 + 11309^2 .

It is not a de Polignac number, because 138704425 - 2¹⁹ = 138180137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138704429) 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 5 ways as a sum of consecutive naturals, for example, 2774064 + ... + 2774113.

Almost surely, 2^138704425 is an apocalyptic number.

It is an amenable number.

138704425 is a deficient number, since it is larger than the sum of its proper divisors (33289093).

138704425 is an equidigital number, since it uses as much as digits as its factorization.

138704425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5548187 (or 5548182 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 138704425 is about 11777.2842794933. The cubic root of 138704425 is about 517.6427138736.

It can be divided in two parts, 138704 and 425, that added together give a square (139129 = 373²).

The spelling of 138704425 in words is "one hundred thirty-eight million, seven hundred four thousand, four hundred twenty-five".