75129135 has 16 divisors (see below), whose sum is σ = 126533760. Its totient is φ = 37959840.

The previous prime is 75129133. The next prime is 75129139. The reversal of 75129135 is 53192157.

It is not a de Polignac number, because 75129135 - 2¹ = 75129133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75129096 and 75129105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75129133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131521 + ... + 132090.

It is an arithmetic number, because the mean of its divisors is an integer number (7908360).

Almost surely, 2^75129135 is an apocalyptic number.

75129135 is a deficient number, since it is larger than the sum of its proper divisors (51404625).

75129135 is a wasteful number, since it uses less digits than its factorization.

75129135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263638.

The product of its digits is 9450, while the sum is 33.

The square root of 75129135 is about 8667.7064440370. The cubic root of 75129135 is about 421.9582309310.

The spelling of 75129135 in words is "seventy-five million, one hundred twenty-nine thousand, one hundred thirty-five".