75501145 has 4 divisors (see below), whose sum is σ = 90601380. Its totient is φ = 60400912.

The previous prime is 75501137. The next prime is 75501149. The reversal of 75501145 is 54110557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54110557 = 2069 ⋅26153.

It can be written as a sum of positive squares in 2 ways, for example, as 51451929 + 24049216 = 7173^2 + 4904^2 .

It is a cyclic number.

It is not a de Polignac number, because 75501145 - 2³ = 75501137 is a prime.

It is a super-2 number, since 2×75501145² = 11400845792622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75501149) 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, 7550110 + ... + 7550119.

It is an arithmetic number, because the mean of its divisors is an integer number (22650345).

Almost surely, 2^75501145 is an apocalyptic number.

It is an amenable number.

75501145 is a deficient number, since it is larger than the sum of its proper divisors (15100235).

75501145 is a wasteful number, since it uses less digits than its factorization.

75501145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100234.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 75501145 is about 8689.1394855877. The cubic root of 75501145 is about 422.6535417574.

The spelling of 75501145 in words is "seventy-five million, five hundred one thousand, one hundred forty-five".