1325178409 has 9 divisors (see below), whose sum is σ = 1350208087. Its totient is φ = 1300606384.

The previous prime is 1325178397. The next prime is 1325178433. The reversal of 1325178409 is 9048715231.

The square root of 1325178409 is 36403.

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

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 1286800384 = 6195^2 + 35872^2 .

It is not a de Polignac number, because 1325178409 - 2¹¹ = 1325176361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325178499) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2147469 + ... + 2148085.

Almost surely, 2^1325178409 is an apocalyptic number.

1325178409 is the 36403-rd square number.

1325178409 is the 18202-nd centered octagonal number.

It is an amenable number.

1325178409 is a deficient number, since it is larger than the sum of its proper divisors (25029678).

1325178409 is an frugal number, since it uses more digits than its factorization.

1325178409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The cubic root of 1325178409 is about 1098.3939120473.

The spelling of 1325178409 in words is "one billion, three hundred twenty-five million, one hundred seventy-eight thousand, four hundred nine".