123445072 has 10 divisors (see below), whose sum is σ = 239174858. Its totient is φ = 61722528.

The previous prime is 123445037. The next prime is 123445081. The reversal of 123445072 is 270544321.

It can be written as a sum of positive squares in only one way, i.e., 98883136 + 24561936 = 9944^2 + 4956^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123445072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3857643 + ... + 3857674.

Almost surely, 2^123445072 is an apocalyptic number.

It is an amenable number.

123445072 is a deficient number, since it is larger than the sum of its proper divisors (115729786).

123445072 is an equidigital number, since it uses as much as digits as its factorization.

123445072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715325 (or 7715319 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 123445072 is about 11110.5837830422. The cubic root of 123445072 is about 497.9181061339.

Adding to 123445072 its reverse (270544321), we get a palindrome (393989393).

The spelling of 123445072 in words is "one hundred twenty-three million, four hundred forty-five thousand, seventy-two".