123100445 has 12 divisors (see below), whose sum is σ = 159958836. Its totient is φ = 90904320.

The previous prime is 123100441. The next prime is 123100493. The reversal of 123100445 is 544001321.

It can be written as a sum of positive squares in 6 ways, for example, as 63409369 + 59691076 = 7963^2 + 7726^2 .

It is not a de Polignac number, because 123100445 - 2² = 123100441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123100441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71996 + ... + 73685.

It is an arithmetic number, because the mean of its divisors is an integer number (13329903).

Almost surely, 2^123100445 is an apocalyptic number.

It is an amenable number.

123100445 is a deficient number, since it is larger than the sum of its proper divisors (36858391).

123100445 is a wasteful number, since it uses less digits than its factorization.

123100445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145712 (or 145699 counting only the distinct ones).

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

The square root of 123100445 is about 11095.0639926050. The cubic root of 123100445 is about 497.4543210335.

Adding to 123100445 its reverse (544001321), we get a palindrome (667101766).

The spelling of 123100445 in words is "one hundred twenty-three million, one hundred thousand, four hundred forty-five".