75814021 has 4 divisors (see below), whose sum is σ = 76128844. Its totient is φ = 75499200.

The previous prime is 75813989. The next prime is 75814061. The reversal of 75814021 is 12041857.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24117921 + 51696100 = 4911^2 + 7190^2 .

It is a cyclic number.

It is not a de Polignac number, because 75814021 - 2⁵ = 75813989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75814061) 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, 157050 + ... + 157531.

It is an arithmetic number, because the mean of its divisors is an integer number (19032211).

Almost surely, 2^75814021 is an apocalyptic number.

It is an amenable number.

75814021 is a deficient number, since it is larger than the sum of its proper divisors (314823).

75814021 is a wasteful number, since it uses less digits than its factorization.

75814021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314822.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 75814021 is about 8707.1247263376. The cubic root of 75814021 is about 423.2365611909.

Adding to 75814021 its reverse (12041857), we get a palindrome (87855878).

The spelling of 75814021 in words is "seventy-five million, eight hundred fourteen thousand, twenty-one".