1365561229 has 2 divisors, whose sum is σ = 1365561230. Its totient is φ = 1365561228.

The previous prime is 1365561203. The next prime is 1365561341. The reversal of 1365561229 is 9221655631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 907515625 + 458045604 = 30125^2 + 21402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1365561229 - 2¹³ = 1365553037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1365561191 and 1365561200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1365561529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682780614 + 682780615.

It is an arithmetic number, because the mean of its divisors is an integer number (682780615).

Almost surely, 2^1365561229 is an apocalyptic number.

It is an amenable number.

1365561229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365561229 is an equidigital number, since it uses as much as digits as its factorization.

1365561229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 1365561229 is about 36953.5009031621. The cubic root of 1365561229 is about 1109.4397597575.

The spelling of 1365561229 in words is "one billion, three hundred sixty-five million, five hundred sixty-one thousand, two hundred twenty-nine".