123530445 has 12 divisors (see below), whose sum is σ = 214119516. Its totient is φ = 65882880.

The previous prime is 123530431. The next prime is 123530461. The reversal of 123530445 is 544035321.

123530445 is a `hidden beast` number, since 123 + 530 + 4 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17089956 + 106440489 = 4134^2 + 10317^2 .

It is not a de Polignac number, because 123530445 - 2⁵ = 123530413 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1372516 + ... + 1372605.

It is an arithmetic number, because the mean of its divisors is an integer number (17843293).

Almost surely, 2^123530445 is an apocalyptic number.

123530445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123530445 is a deficient number, since it is larger than the sum of its proper divisors (90589071).

123530445 is a wasteful number, since it uses less digits than its factorization.

123530445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745132 (or 2745129 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 123530445 is about 11114.4250863461. The cubic root of 123530445 is about 498.0328642365.

Adding to 123530445 its reverse (544035321), we get a palindrome (667565766).

The spelling of 123530445 in words is "one hundred twenty-three million, five hundred thirty thousand, four hundred forty-five".