78145125 has 16 divisors (see below), whose sum is σ = 130034112. Its totient is φ = 41677200.

The previous prime is 78145117. The next prime is 78145127. The reversal of 78145125 is 52154187.

It is not a de Polignac number, because 78145125 - 2³ = 78145117 is a prime.

It is a super-2 number, since 2×78145125² = 12213321122531250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78145127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103819 + ... + 104568.

It is an arithmetic number, because the mean of its divisors is an integer number (8127132).

Almost surely, 2^78145125 is an apocalyptic number.

78145125 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78145125 is a deficient number, since it is larger than the sum of its proper divisors (51888987).

78145125 is a wasteful number, since it uses less digits than its factorization.

78145125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208405 (or 208395 counting only the distinct ones).

The product of its digits is 11200, while the sum is 33.

The square root of 78145125 is about 8839.9731334433. The cubic root of 78145125 is about 427.5306910013.

The spelling of 78145125 in words is "seventy-eight million, one hundred forty-five thousand, one hundred twenty-five".