1319505625 has 15 divisors (see below), whose sum is σ = 1649989803. Its totient is φ = 1054878000.

The previous prime is 1319505623. The next prime is 1319505631. The reversal of 1319505625 is 5265059131.

The square root of 1319505625 is 36325.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 240777289 + 1078728336 = 15517^2 + 32844^2 .

It is not a de Polignac number, because 1319505625 - 2¹ = 1319505623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1319505623) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 907399 + ... + 908851.

Almost surely, 2^1319505625 is an apocalyptic number.

1319505625 is the 36325-th square number.

1319505625 is the 18163-rd centered octagonal number.

It is an amenable number.

1319505625 is a deficient number, since it is larger than the sum of its proper divisors (330484178).

1319505625 is an frugal number, since it uses more digits than its factorization.

1319505625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The cubic root of 1319505625 is about 1096.8243463539.

It can be divided in two parts, 1319 and 505625, that added together give a square (506944 = 712²).

The spelling of 1319505625 in words is "one billion, three hundred nineteen million, five hundred five thousand, six hundred twenty-five".