75457642 has 8 divisors (see below), whose sum is σ = 121893156. Its totient is φ = 34826592.

The previous prime is 75457631. The next prime is 75457643. The reversal of 75457642 is 24675457.

It can be written as a sum of positive squares in 2 ways, for example, as 74459641 + 998001 = 8629^2 + 999^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 75457595 and 75457604.

It is not an unprimeable number, because it can be changed into a prime (75457643) 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, 1451083 + ... + 1451134.

Almost surely, 2^75457642 is an apocalyptic number.

75457642 is a deficient number, since it is larger than the sum of its proper divisors (46435514).

75457642 is a wasteful number, since it uses less digits than its factorization.

75457642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902232.

The product of its digits is 235200, while the sum is 40.

The square root of 75457642 is about 8686.6358275226. The cubic root of 75457642 is about 422.5723499222.

The spelling of 75457642 in words is "seventy-five million, four hundred fifty-seven thousand, six hundred forty-two".