124128025 has 36 divisors (see below), whose sum is σ = 180912528. Its totient is φ = 84231840.

The previous prime is 124128023. The next prime is 124128031. The reversal of 124128025 is 520821421.

It is not a de Polignac number, because 124128025 - 2¹ = 124128023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124128023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130602 + ... + 131548.

It is an arithmetic number, because the mean of its divisors is an integer number (5025348).

Almost surely, 2^124128025 is an apocalyptic number.

It is an amenable number.

124128025 is a deficient number, since it is larger than the sum of its proper divisors (56784503).

124128025 is a wasteful number, since it uses less digits than its factorization.

124128025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 124128025 is about 11141.2757348519. The cubic root of 124128025 is about 498.8346527082.

Adding to 124128025 its reverse (520821421), we get a palindrome (644949446).

The spelling of 124128025 in words is "one hundred twenty-four million, one hundred twenty-eight thousand, twenty-five".