123612545 has 24 divisors (see below), whose sum is σ = 174522600. Its totient is φ = 83795712.

The previous prime is 123612527. The next prime is 123612551. The reversal of 123612545 is 545216321.

It can be written as a sum of positive squares in 4 ways, for example, as 47089 + 123565456 = 217^2 + 11116^2 .

It is not a de Polignac number, because 123612545 - 2¹⁶ = 123547009 is a prime.

It is a super-2 number, since 2×123612545² = 30560122562754050, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18971 + ... + 24639.

It is an arithmetic number, because the mean of its divisors is an integer number (7271775).

Almost surely, 2^123612545 is an apocalyptic number.

It is an amenable number.

123612545 is a deficient number, since it is larger than the sum of its proper divisors (50910055).

123612545 is an equidigital number, since it uses as much as digits as its factorization.

123612545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777 (or 5770 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 123612545 is about 11118.1178712946. The cubic root of 123612545 is about 498.1431729224.

Adding to 123612545 its reverse (545216321), we get a palindrome (668828866).

The spelling of 123612545 in words is "one hundred twenty-three million, six hundred twelve thousand, five hundred forty-five".