1325907772 has 48 divisors (see below), whose sum is σ = 2778918912. Its totient is φ = 541221120.

The previous prime is 1325907763. The next prime is 1325907787. The reversal of 1325907772 is 2777095231.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150933 + ... + 159475.

It is an arithmetic number, because the mean of its divisors is an integer number (57894144).

Almost surely, 2^1325907772 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 1325907772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389459456).

1325907772 is an abundant number, since it is smaller than the sum of its proper divisors (1453011140).

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

1325907772 is a wasteful number, since it uses less digits than its factorization.

1325907772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8818 (or 8816 counting only the distinct ones).

The product of its (nonzero) digits is 185220, while the sum is 43.

The square root of 1325907772 is about 36413.0165188219. The cubic root of 1325907772 is about 1098.5953895594.

The spelling of 1325907772 in words is "one billion, three hundred twenty-five million, nine hundred seven thousand, seven hundred seventy-two".