124641687 has 4 divisors (see below), whose sum is σ = 166188920. Its totient is φ = 83094456.

The previous prime is 124641683. The next prime is 124641721. The reversal of 124641687 is 786146421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786146421 = 3 ⋅262048807.

It is not a de Polignac number, because 124641687 - 2² = 124641683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124641683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20773612 + ... + 20773617.

It is an arithmetic number, because the mean of its divisors is an integer number (41547230).

Almost surely, 2^124641687 is an apocalyptic number.

124641687 is a deficient number, since it is larger than the sum of its proper divisors (41547233).

124641687 is an equidigital number, since it uses as much as digits as its factorization.

124641687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41547232.

The product of its digits is 64512, while the sum is 39.

The square root of 124641687 is about 11164.3041431161. The cubic root of 124641687 is about 499.5217921136.

The spelling of 124641687 in words is "one hundred twenty-four million, six hundred forty-one thousand, six hundred eighty-seven".