78432141 has 4 divisors (see below), whose sum is σ = 104576192. Its totient is φ = 52288092.

The previous prime is 78432127. The next prime is 78432157. The reversal of 78432141 is 14123487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78432141 - 2⁹ = 78431629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78432099 and 78432108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78432121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13072021 + ... + 13072026.

It is an arithmetic number, because the mean of its divisors is an integer number (26144048).

Almost surely, 2^78432141 is an apocalyptic number.

It is an amenable number.

78432141 is a deficient number, since it is larger than the sum of its proper divisors (26144051).

78432141 is a wasteful number, since it uses less digits than its factorization.

78432141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26144050.

The product of its digits is 5376, while the sum is 30.

The square root of 78432141 is about 8856.1922404609. The cubic root of 78432141 is about 428.0534714252.

The spelling of 78432141 in words is "seventy-eight million, four hundred thirty-two thousand, one hundred forty-one".