124128387 has 12 divisors (see below), whose sum is σ = 188733480. Its totient is φ = 78396768.

The previous prime is 124128383. The next prime is 124128413. The reversal of 124128387 is 783821421.

It is not a de Polignac number, because 124128387 - 2² = 124128383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124128383) 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, 362778 + ... + 363119.

It is an arithmetic number, because the mean of its divisors is an integer number (15727790).

Almost surely, 2^124128387 is an apocalyptic number.

124128387 is a deficient number, since it is larger than the sum of its proper divisors (64605093).

124128387 is a wasteful number, since it uses less digits than its factorization.

124128387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725922 (or 725919 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 124128387 is about 11141.2919807354. The cubic root of 124128387 is about 498.8351376321.

The spelling of 124128387 in words is "one hundred twenty-four million, one hundred twenty-eight thousand, three hundred eighty-seven".