123020545 has 8 divisors (see below), whose sum is σ = 147867624. Its totient is φ = 98254464.

The previous prime is 123020543. The next prime is 123020563. The reversal of 123020545 is 545020321.

It can be written as a sum of positive squares in 4 ways, for example, as 4036081 + 118984464 = 2009^2 + 10908^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 123020545 - 2¹ = 123020543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123020543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16854 + ... + 23023.

It is an arithmetic number, because the mean of its divisors is an integer number (18483453).

Almost surely, 2^123020545 is an apocalyptic number.

It is an amenable number.

123020545 is a deficient number, since it is larger than the sum of its proper divisors (24847079).

123020545 is an equidigital number, since it uses as much as digits as its factorization.

123020545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40499.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 123020545 is about 11091.4627078668. The cubic root of 123020545 is about 497.3466712664.

Adding to 123020545 its reverse (545020321), we get a palindrome (668040866).

The spelling of 123020545 in words is "one hundred twenty-three million, twenty thousand, five hundred forty-five".