123561472 has 40 divisors (see below), whose sum is σ = 247926096. Its totient is φ = 61519872.

The previous prime is 123561461. The next prime is 123561509. The reversal of 123561472 is 274165321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190653 + ... + 191299.

Almost surely, 2^123561472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123561472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123963048).

123561472 is an abundant number, since it is smaller than the sum of its proper divisors (124364624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123561472 is an frugal number, since it uses more digits than its factorization.

123561472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038 (or 1022 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 123561472 is about 11115.8207974040. The cubic root of 123561472 is about 498.0745575269.

The spelling of 123561472 in words is "one hundred twenty-three million, five hundred sixty-one thousand, four hundred seventy-two".