78012501 has 16 divisors (see below), whose sum is σ = 120056448. Its totient is φ = 44136000.

The previous prime is 78012497. The next prime is 78012503. The reversal of 78012501 is 10521087.

It is not a de Polignac number, because 78012501 - 2² = 78012497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78012503) 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 15 ways as a sum of consecutive naturals, for example, 16270 + ... + 20511.

It is an arithmetic number, because the mean of its divisors is an integer number (7503528).

Almost surely, 2^78012501 is an apocalyptic number.

It is an amenable number.

78012501 is a deficient number, since it is larger than the sum of its proper divisors (42043947).

78012501 is a wasteful number, since it uses less digits than its factorization.

78012501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36892.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 78012501 is about 8832.4685677335. The cubic root of 78012501 is about 427.2886928078.

Adding to 78012501 its reverse (10521087), we get a palindrome (88533588).

The spelling of 78012501 in words is "seventy-eight million, twelve thousand, five hundred one".