75421904 has 10 divisors (see below), whose sum is σ = 146129970. Its totient is φ = 37710944.

The previous prime is 75421859. The next prime is 75421937. The reversal of 75421904 is 40912457.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 29724304 = 6760^2 + 5452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2356919 + ... + 2356950.

It is an arithmetic number, because the mean of its divisors is an integer number (14612997).

Almost surely, 2^75421904 is an apocalyptic number.

It is an amenable number.

75421904 is a deficient number, since it is larger than the sum of its proper divisors (70708066).

75421904 is a wasteful number, since it uses less digits than its factorization.

75421904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713877 (or 4713871 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 75421904 is about 8684.5785159673. The cubic root of 75421904 is about 422.5056269456.

The spelling of 75421904 in words is "seventy-five million, four hundred twenty-one thousand, nine hundred four".