1258666341409 has 9 divisors (see below), whose sum is σ = 1262067001779. Its totient is φ = 1255274828640.

The previous prime is 1258666341353. The next prime is 1258666341437. The reversal of 1258666341409 is 9041436668521.

The square root of 1258666341409 is 1121903.

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., 141146733025 + 1117519608384 = 375695^2 + 1057128^2 .

It is not a de Polignac number, because 1258666341409 - 2²⁵ = 1258632786977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1258666341409.

It is not an unprimeable number, because it can be changed into a prime (1258666341109) 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, 485782704 + ... + 485785294.

Almost surely, 2^{1258666341409} is an apocalyptic number.

1258666341409 is the 1121903-rd square number.

1258666341409 is the 560952-nd centered octagonal number.

It is an amenable number.

1258666341409 is a deficient number, since it is larger than the sum of its proper divisors (3400660370).

1258666341409 is an frugal number, since it uses more digits than its factorization.

1258666341409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048 (or 3024 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 1258666341409 in words is "one trillion, two hundred fifty-eight billion, six hundred sixty-six million, three hundred forty-one thousand, four hundred nine".