75405406 has 4 divisors (see below), whose sum is σ = 113108112. Its totient is φ = 37702702.

The previous prime is 75405403. The next prime is 75405413. The reversal of 75405406 is 60450457.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60450457 = 19 ⋅3181603.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75405401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18851350 + ... + 18851353.

It is an arithmetic number, because the mean of its divisors is an integer number (28277028).

Almost surely, 2^75405406 is an apocalyptic number.

75405406 is a deficient number, since it is larger than the sum of its proper divisors (37702706).

75405406 is a wasteful number, since it uses less digits than its factorization.

75405406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37702705.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 75405406 is about 8683.6286194194. The cubic root of 75405406 is about 422.4748180082.

The spelling of 75405406 in words is "seventy-five million, four hundred five thousand, four hundred six".