1325906569 has 9 divisors (see below), whose sum is σ = 1436257749. Its totient is φ = 1223476800.

The previous prime is 1325906563. The next prime is 1325906609. The reversal of 1325906569 is 9656095231.

The square root of 1325906569 is 36413.

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

It can be written as a sum of positive squares in 4 ways, for example, as 182655225 + 1143251344 = 13515^2 + 33812^2 .

It is not a de Polignac number, because 1325906569 - 2¹⁷ = 1325775497 is a prime.

It is a super-2 number, since 2×1325906569² = 3516056459434703522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325906563) 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, 471969 + ... + 474769.

Almost surely, 2^1325906569 is an apocalyptic number.

1325906569 is the 36413-rd square number.

1325906569 is the 18207-th centered octagonal number.

It is an amenable number.

1325906569 is a deficient number, since it is larger than the sum of its proper divisors (110351180).

1325906569 is an frugal number, since it uses more digits than its factorization.

1325906569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628 (or 2814 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 46.

The cubic root of 1325906569 is about 1098.5950573064.

The spelling of 1325906569 in words is "one billion, three hundred twenty-five million, nine hundred six thousand, five hundred sixty-nine".