75249129 has 4 divisors (see below), whose sum is σ = 100332176. Its totient is φ = 50166084.

The previous prime is 75249127. The next prime is 75249133. The reversal of 75249129 is 92194257.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 75249129 - 2¹ = 75249127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75249127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12541519 + ... + 12541524.

It is an arithmetic number, because the mean of its divisors is an integer number (25083044).

Almost surely, 2^75249129 is an apocalyptic number.

It is an amenable number.

75249129 is a deficient number, since it is larger than the sum of its proper divisors (25083047).

75249129 is a wasteful number, since it uses less digits than its factorization.

75249129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25083046.

The product of its digits is 45360, while the sum is 39.

The square root of 75249129 is about 8674.6255826981. The cubic root of 75249129 is about 422.1827577791.

It can be divided in two parts, 7524 and 9129, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 75249129 in words is "seventy-five million, two hundred forty-nine thousand, one hundred twenty-nine".