78351125 has 8 divisors (see below), whose sum is σ = 97782360. Its totient is φ = 62680800.

The previous prime is 78351121. The next prime is 78351139. The reversal of 78351125 is 52115387.

It can be written as a sum of positive squares in 4 ways, for example, as 20484676 + 57866449 = 4526^2 + 7607^2 .

It is not a de Polignac number, because 78351125 - 2² = 78351121 is a prime.

It is a super-2 number, since 2×78351125² = 12277797577531250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78351091 and 78351100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78351121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313280 + ... + 313529.

It is an arithmetic number, because the mean of its divisors is an integer number (12222795).

Almost surely, 2^78351125 is an apocalyptic number.

It is an amenable number.

78351125 is a deficient number, since it is larger than the sum of its proper divisors (19431235).

78351125 is an equidigital number, since it uses as much as digits as its factorization.

78351125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626824 (or 626814 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 78351125 is about 8851.6170839005. The cubic root of 78351125 is about 427.9060355781.

The spelling of 78351125 in words is "seventy-eight million, three hundred fifty-one thousand, one hundred twenty-five".