123021245 has 8 divisors (see below), whose sum is σ = 147688920. Its totient is φ = 98374720.

The previous prime is 123021221. The next prime is 123021253. The reversal of 123021245 is 542120321.

It can be written as a sum of positive squares in 4 ways, for example, as 188356 + 122832889 = 434^2 + 11083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123021245 - 2¹⁰ = 123020221 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13751 + ... + 20859.

It is an arithmetic number, because the mean of its divisors is an integer number (18461115).

Almost surely, 2^123021245 is an apocalyptic number.

It is an amenable number.

123021245 is a deficient number, since it is larger than the sum of its proper divisors (24667675).

123021245 is an equidigital number, since it uses as much as digits as its factorization.

123021245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10575.

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

The square root of 123021245 is about 11091.4942636238. The cubic root of 123021245 is about 497.3476145831.

Adding to 123021245 its reverse (542120321), we get a palindrome (665141566).

The spelling of 123021245 in words is "one hundred twenty-three million, twenty-one thousand, two hundred forty-five".