75039945 has 16 divisors (see below), whose sum is σ = 122857152. Its totient is φ = 39090240.

The previous prime is 75039931. The next prime is 75039953. The reversal of 75039945 is 54993057.

It is not a de Polignac number, because 75039945 - 2⁷ = 75039817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75039897 and 75039906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57526 + ... + 58815.

It is an arithmetic number, because the mean of its divisors is an integer number (7678572).

Almost surely, 2^75039945 is an apocalyptic number.

It is an amenable number.

75039945 is a deficient number, since it is larger than the sum of its proper divisors (47817207).

75039945 is a wasteful number, since it uses less digits than its factorization.

75039945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116392.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 75039945 is about 8662.5599565025. The cubic root of 75039945 is about 421.7911880694.

The spelling of 75039945 in words is "seventy-five million, thirty-nine thousand, nine hundred forty-five".