75780001 has 12 divisors (see below), whose sum is σ = 83638912. Its totient is φ = 68607000.

The previous prime is 75779981. The next prime is 75780007. The reversal of 75780001 is 10008757.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-75780001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75780007) 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 in 11 ways as a sum of consecutive naturals, for example, 31636 + ... + 33946.

Almost surely, 2^75780001 is an apocalyptic number.

It is an amenable number.

75780001 is a deficient number, since it is larger than the sum of its proper divisors (7858911).

75780001 is a wasteful number, since it uses less digits than its factorization.

75780001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604 (or 2593 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 75780001 is about 8705.1709345653. The cubic root of 75780001 is about 423.1732454531.

Adding to 75780001 its reverse (10008757), we get a palindrome (85788758).

The spelling of 75780001 in words is "seventy-five million, seven hundred eighty thousand, one".