123021425 has 12 divisors (see below), whose sum is σ = 154638540. Its totient is φ = 97067520.

The previous prime is 123021413. The next prime is 123021473. The reversal of 123021425 is 524120321.

It can be written as a sum of positive squares in 6 ways, for example, as 99856 + 122921569 = 316^2 + 11087^2 .

It is not a de Polignac number, because 123021425 - 2²⁴ = 106244209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123021397 and 123021406.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 31880 + ... + 35529.

It is an arithmetic number, because the mean of its divisors is an integer number (12886545).

Almost surely, 2^123021425 is an apocalyptic number.

It is an amenable number.

123021425 is a deficient number, since it is larger than the sum of its proper divisors (31617115).

123021425 is an equidigital number, since it uses as much as digits as its factorization.

123021425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67492 (or 67487 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123021425 is about 11091.5023779468. The cubic root of 123021425 is about 497.3478571497.

Adding to 123021425 its reverse (524120321), we get a palindrome (647141746).

The spelling of 123021425 in words is "one hundred twenty-three million, twenty-one thousand, four hundred twenty-five".