123056545 has 8 divisors (see below), whose sum is σ = 147764520. Its totient is φ = 98380800.

The previous prime is 123056543. The next prime is 123056569. The reversal of 123056545 is 545650321.

It can be written as a sum of positive squares in 4 ways, for example, as 32273761 + 90782784 = 5681^2 + 9528^2 .

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

It is not a de Polignac number, because 123056545 - 2¹ = 123056543 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123056543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345 + ... + 15745.

It is an arithmetic number, because the mean of its divisors is an integer number (18470565).

Almost surely, 2^123056545 is an apocalyptic number.

It is an amenable number.

123056545 is a deficient number, since it is larger than the sum of its proper divisors (24707975).

123056545 is a wasteful number, since it uses less digits than its factorization.

123056545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16115.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 123056545 is about 11093.0854589695. The cubic root of 123056545 is about 497.3951800580.

It can be divided in two parts, 1230 and 56545, that added together give a palindrome (57775).

The spelling of 123056545 in words is "one hundred twenty-three million, fifty-six thousand, five hundred forty-five".