1231725744 has 80 divisors (see below), whose sum is σ = 3545308800. Its totient is φ = 409437504.

The previous prime is 1231725743. The next prime is 1231725751. The reversal of 1231725744 is 4475271321.

1231725744 is a `hidden beast` number, since 12 + 3 + 1 + 72 + 574 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1231725699 and 1231725708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231725743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159967 + ... + 167489.

It is an arithmetic number, because the mean of its divisors is an integer number (44316360).

Almost surely, 2^1231725744 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 1231725744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772654400).

1231725744 is an abundant number, since it is smaller than the sum of its proper divisors (2313583056).

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

1231725744 is a wasteful number, since it uses less digits than its factorization.

1231725744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919 (or 7907 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 1231725744 is about 35095.9505356387. The cubic root of 1231725744 is about 1071.9421285682.

The spelling of 1231725744 in words is "one billion, two hundred thirty-one million, seven hundred twenty-five thousand, seven hundred forty-four".