75021985 has 8 divisors (see below), whose sum is σ = 93130920. Its totient is φ = 57947904.

The previous prime is 75021967. The next prime is 75022001. The reversal of 75021985 is 58912057.

It can be written as a sum of positive squares in 4 ways, for example, as 20439441 + 54582544 = 4521^2 + 7388^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75021985 - 2⁷ = 75021857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258552 + ... + 258841.

It is an arithmetic number, because the mean of its divisors is an integer number (11641365).

Almost surely, 2^75021985 is an apocalyptic number.

It is an amenable number.

75021985 is a deficient number, since it is larger than the sum of its proper divisors (18108935).

75021985 is a wasteful number, since it uses less digits than its factorization.

75021985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517427.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 75021985 is about 8661.5232494060. The cubic root of 75021985 is about 421.7575349966.

The spelling of 75021985 in words is "seventy-five million, twenty-one thousand, nine hundred eighty-five".