78725141 has 24 divisors (see below), whose sum is σ = 89886720. Its totient is φ = 68856480.

The previous prime is 78725137. The next prime is 78725149. The reversal of 78725141 is 14152787.

It is not a de Polignac number, because 78725141 - 2² = 78725137 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78725149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 619820 + ... + 619946.

It is an arithmetic number, because the mean of its divisors is an integer number (3745280).

Almost surely, 2^78725141 is an apocalyptic number.

78725141 is the 5123-rd octagonal number.

It is an amenable number.

78725141 is a deficient number, since it is larger than the sum of its proper divisors (11161579).

78725141 is a wasteful number, since it uses less digits than its factorization.

78725141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 294 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 78725141 is about 8872.7189181220. The cubic root of 78725141 is about 428.5858374150.

The spelling of 78725141 in words is "seventy-eight million, seven hundred twenty-five thousand, one hundred forty-one".