75020045 has 4 divisors (see below), whose sum is σ = 90024060. Its totient is φ = 60016032.

The previous prime is 75020041. The next prime is 75020051. The reversal of 75020045 is 54002057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54002057 = 811 ⋅66587.

It can be written as a sum of positive squares in 2 ways, for example, as 9523396 + 65496649 = 3086^2 + 8093^2 .

It is a cyclic number.

It is not a de Polignac number, because 75020045 - 2² = 75020041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75020045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75020041) 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, 7502000 + ... + 7502009.

It is an arithmetic number, because the mean of its divisors is an integer number (22506015).

Almost surely, 2^75020045 is an apocalyptic number.

It is an amenable number.

75020045 is a deficient number, since it is larger than the sum of its proper divisors (15004015).

75020045 is a wasteful number, since it uses less digits than its factorization.

75020045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15004014.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 75020045 is about 8661.4112591425. The cubic root of 75020045 is about 421.7538995438.

The spelling of 75020045 in words is "seventy-five million, twenty thousand, forty-five".