1325130206449 has 9 divisors (see below), whose sum is σ = 1541487368907. Its totient is φ = 1135818984384.

The previous prime is 1325130206431. The next prime is 1325130206473. The reversal of 1325130206449 is 9446020315231.

The square root of 1325130206449 is 1151143.

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., 1022410166449 + 302720040000 = 1011143^2 + 550200^2 .

It is not a de Polignac number, because 1325130206449 - 2⁷ = 1325130206321 is a prime.

It is a super-2 number, since 2×1325130206449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325130206419) 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, 7975777 + ... + 8140225.

It is an arithmetic number, because the mean of its divisors is an integer number (171276374323).

Almost surely, 2^{1325130206449} is an apocalyptic number.

1325130206449 is the 1151143-rd square number.

1325130206449 is the 575572-nd centered octagonal number.

It is an amenable number.

1325130206449 is a deficient number, since it is larger than the sum of its proper divisors (216357162458).

1325130206449 is an frugal number, since it uses more digits than its factorization.

1325130206449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328912 (or 164456 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 1325130206449 in words is "one trillion, three hundred twenty-five billion, one hundred thirty million, two hundred six thousand, four hundred forty-nine".