1260671569 has 2 divisors, whose sum is σ = 1260671570. Its totient is φ = 1260671568.

The previous prime is 1260671551. The next prime is 1260671591. The reversal of 1260671569 is 9651760621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 941691969 + 318979600 = 30687^2 + 17860^2 .

It is an emirp because it is prime and its reverse (9651760621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1260671569 - 2¹⁵ = 1260638801 is a prime.

It is a super-2 number, since 2×1260671569² = 3178585609769843522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1260675569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630335784 + 630335785.

It is an arithmetic number, because the mean of its divisors is an integer number (630335785).

Almost surely, 2^1260671569 is an apocalyptic number.

It is an amenable number.

1260671569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260671569 is an equidigital number, since it uses as much as digits as its factorization.

1260671569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1260671569 is about 35505.9370950831. The cubic root of 1260671569 is about 1080.2741556518.

The spelling of 1260671569 in words is "one billion, two hundred sixty million, six hundred seventy-one thousand, five hundred sixty-nine".