78054171 has 12 divisors (see below), whose sum is σ = 112694328. Its totient is φ = 48033024.

The previous prime is 78054161. The next prime is 78054181. The reversal of 78054171 is 17145087.

It is an interprime number because it is at equal distance from previous prime (78054161) and next prime (78054181).

It is not a de Polignac number, because 78054171 - 2¹⁷ = 77923099 is a prime.

It is a super-2 number, since 2×78054171² = 12184907220994482, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78054101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76470 + ... + 77483.

It is an arithmetic number, because the mean of its divisors is an integer number (9391194).

Almost surely, 2^78054171 is an apocalyptic number.

78054171 is a deficient number, since it is larger than the sum of its proper divisors (34640157).

78054171 is a wasteful number, since it uses less digits than its factorization.

78054171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153982 (or 153969 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 78054171 is about 8834.8271629953. The cubic root of 78054171 is about 427.3647573290.

The spelling of 78054171 in words is "seventy-eight million, fifty-four thousand, one hundred seventy-one".