138429145 has 8 divisors (see below), whose sum is σ = 166640904. Its totient is φ = 110392704.

The previous prime is 138429133. The next prime is 138429149. The reversal of 138429145 is 541924831.

It can be written as a sum of positive squares in 4 ways, for example, as 1819801 + 136609344 = 1349^2 + 11688^2 .

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 138429145 - 2⁷ = 138429017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138429149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42084 + ... + 45253.

It is an arithmetic number, because the mean of its divisors is an integer number (20830113).

Almost surely, 2^138429145 is an apocalyptic number.

It is an amenable number.

138429145 is a deficient number, since it is larger than the sum of its proper divisors (28211759).

138429145 is an equidigital number, since it uses as much as digits as its factorization.

138429145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87659.

The product of its digits is 34560, while the sum is 37.

The square root of 138429145 is about 11765.5915703376. The cubic root of 138429145 is about 517.3000402131.

The spelling of 138429145 in words is "one hundred thirty-eight million, four hundred twenty-nine thousand, one hundred forty-five".