1325281672 has 128 divisors (see below), whose sum is σ = 3093552000. Its totient is φ = 523837440.

The previous prime is 1325281649. The next prime is 1325281687. The reversal of 1325281672 is 2761825231.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1426104 + ... + 1427032.

It is an arithmetic number, because the mean of its divisors is an integer number (24168375).

Almost surely, 2^1325281672 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 1325281672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1546776000).

1325281672 is an abundant number, since it is smaller than the sum of its proper divisors (1768270328).

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

1325281672 is a wasteful number, since it uses less digits than its factorization.

1325281672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1027 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 1325281672 is about 36404.4183032774. The cubic root of 1325281672 is about 1098.4224416661.

The spelling of 1325281672 in words is "one billion, three hundred twenty-five million, two hundred eighty-one thousand, six hundred seventy-two".