123872529 has 16 divisors (see below), whose sum is σ = 181333440. Its totient is φ = 74592960.

The previous prime is 123872527. The next prime is 123872531. The reversal of 123872529 is 925278321.

It is an interprime number because it is at equal distance from previous prime (123872527) and next prime (123872531).

It is not a de Polignac number, because 123872529 - 2¹ = 123872527 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123872527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6774 + ... + 17135.

It is an arithmetic number, because the mean of its divisors is an integer number (11333340).

Almost surely, 2^123872529 is an apocalyptic number.

It is an amenable number.

123872529 is a deficient number, since it is larger than the sum of its proper divisors (57460911).

123872529 is a wasteful number, since it uses less digits than its factorization.

123872529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24080.

The product of its digits is 60480, while the sum is 39.

The square root of 123872529 is about 11129.8036370818. The cubic root of 123872529 is about 498.4921627579.

The spelling of 123872529 in words is "one hundred twenty-three million, eight hundred seventy-two thousand, five hundred twenty-nine".