135121744 has 10 divisors (see below), whose sum is σ = 261798410. Its totient is φ = 67560864.

The previous prime is 135121703. The next prime is 135121747. The reversal of 135121744 is 447121531.

It can be written as a sum of positive squares in only one way, i.e., 135024400 + 97344 = 11620^2 + 312^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135121747) 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 as a sum of consecutive naturals, namely, 4222539 + ... + 4222570.

It is an arithmetic number, because the mean of its divisors is an integer number (26179841).

Almost surely, 2^135121744 is an apocalyptic number.

It is an amenable number.

135121744 is a deficient number, since it is larger than the sum of its proper divisors (126676666).

135121744 is an equidigital number, since it uses as much as digits as its factorization.

135121744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8445117 (or 8445111 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 135121744 is about 11624.1878856116. The cubic root of 135121744 is about 513.1469445688.

The spelling of 135121744 in words is "one hundred thirty-five million, one hundred twenty-one thousand, seven hundred forty-four".