78025001 has 4 divisors (see below), whose sum is σ = 82131600. Its totient is φ = 73918404.

The previous prime is 78024997. The next prime is 78025033. The reversal of 78025001 is 10052087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10052087 = 199 ⋅50513.

It is a cyclic number.

It is not a de Polignac number, because 78025001 - 2² = 78024997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78025201) 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 3 ways as a sum of consecutive naturals, for example, 2053271 + ... + 2053308.

It is an arithmetic number, because the mean of its divisors is an integer number (20532900).

Almost surely, 2^78025001 is an apocalyptic number.

It is an amenable number.

78025001 is a deficient number, since it is larger than the sum of its proper divisors (4106599).

78025001 is a wasteful number, since it uses less digits than its factorization.

78025001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106598.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 78025001 is about 8833.1761558343. The cubic root of 78025001 is about 427.3115131821.

Adding to 78025001 its reverse (10052087), we get a palindrome (88077088).

The spelling of 78025001 in words is "seventy-eight million, twenty-five thousand, one".