1320172372 has 6 divisors (see below), whose sum is σ = 2310301658. Its totient is φ = 660086184.

The previous prime is 1320172361. The next prime is 1320172391. The reversal of 1320172372 is 2732710231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 730945296 + 589227076 = 27036^2 + 24274^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1320172372.

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, 165021543 + ... + 165021550.

Almost surely, 2^1320172372 is an apocalyptic number.

It is an amenable number.

1320172372 is a deficient number, since it is larger than the sum of its proper divisors (990129286).

1320172372 is a wasteful number, since it uses less digits than its factorization.

1320172372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330043097 (or 330043095 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 1320172372 is about 36334.1763633084. The cubic root of 1320172372 is about 1097.0090572504.

The spelling of 1320172372 in words is "one billion, three hundred twenty million, one hundred seventy-two thousand, three hundred seventy-two".