75681442 has 4 divisors (see below), whose sum is σ = 113522166. Its totient is φ = 37840720.

The previous prime is 75681439. The next prime is 75681443. The reversal of 75681442 is 24418657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24418657 = 41 ⋅595577.

It can be written as a sum of positive squares in only one way, i.e., 65626201 + 10055241 = 8101^2 + 3171^2 .

It is not an unprimeable number, because it can be changed into a prime (75681443) by changing a digit.

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 as a sum of consecutive naturals, namely, 18920359 + ... + 18920362.

Almost surely, 2^75681442 is an apocalyptic number.

75681442 is a deficient number, since it is larger than the sum of its proper divisors (37840724).

75681442 is a wasteful number, since it uses less digits than its factorization.

75681442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37840723.

The product of its digits is 53760, while the sum is 37.

The square root of 75681442 is about 8699.5081470161. The cubic root of 75681442 is about 422.9897070264.

The spelling of 75681442 in words is "seventy-five million, six hundred eighty-one thousand, four hundred forty-two".