123158085 has 32 divisors (see below), whose sum is σ = 201415680. Its totient is φ = 64243200.

The previous prime is 123158083. The next prime is 123158093. The reversal of 123158085 is 580851321.

It is a happy number.

It is not a de Polignac number, because 123158085 - 2¹ = 123158083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123158083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256876 + ... + 257354.

It is an arithmetic number, because the mean of its divisors is an integer number (6294240).

Almost surely, 2^123158085 is an apocalyptic number.

123158085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123158085 is a deficient number, since it is larger than the sum of its proper divisors (78257595).

123158085 is a wasteful number, since it uses less digits than its factorization.

123158085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 123158085 is about 11097.6612400992. The cubic root of 123158085 is about 497.5319508448.

It can be divided in two parts, 1231580 and 85, that added together give a triangular number (1231665 = T₁₅₆₉).

The spelling of 123158085 in words is "one hundred twenty-three million, one hundred fifty-eight thousand, eighty-five".