75122745 has 32 divisors (see below), whose sum is σ = 129195648. Its totient is φ = 37137408.

The previous prime is 75122743. The next prime is 75122771. The reversal of 75122745 is 54722157.

It is not a de Polignac number, because 75122745 - 2¹ = 75122743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75122743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14887 + ... + 19283.

It is an arithmetic number, because the mean of its divisors is an integer number (4037364).

Almost surely, 2^75122745 is an apocalyptic number.

It is an amenable number.

75122745 is a deficient number, since it is larger than the sum of its proper divisors (54072903).

75122745 is a wasteful number, since it uses less digits than its factorization.

75122745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489.

The product of its digits is 19600, while the sum is 33.

The square root of 75122745 is about 8667.3378265763. The cubic root of 75122745 is about 421.9462675760.

The spelling of 75122745 in words is "seventy-five million, one hundred twenty-two thousand, seven hundred forty-five".