123777625 has 16 divisors (see below), whose sum is σ = 155115792. Its totient is φ = 98611200.

The previous prime is 123777623. The next prime is 123777653. The reversal of 123777625 is 526777321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 589824 + 123187801 = 768^2 + 11099^2 .

It is not a de Polignac number, because 123777625 - 2¹ = 123777623 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 (123777623) 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 15 ways as a sum of consecutive naturals, for example, 30199 + ... + 34051.

It is an arithmetic number, because the mean of its divisors is an integer number (9694737).

Almost surely, 2^123777625 is an apocalyptic number.

It is an amenable number.

123777625 is a deficient number, since it is larger than the sum of its proper divisors (31338167).

123777625 is an equidigital number, since it uses as much as digits as its factorization.

123777625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125 (or 4115 counting only the distinct ones).

The product of its digits is 123480, while the sum is 40.

The square root of 123777625 is about 11125.5393127704. The cubic root of 123777625 is about 498.3648249010.

It can be divided in two parts, 12377 and 7625, that added together give a palindrome (20002).

The spelling of 123777625 in words is "one hundred twenty-three million, seven hundred seventy-seven thousand, six hundred twenty-five".