1361208605 has 16 divisors (see below), whose sum is σ = 1689984000. Its totient is φ = 1051438080.

The previous prime is 1361208587. The next prime is 1361208619. The reversal of 1361208605 is 5068021631.

It is a happy number.

It is not a de Polignac number, because 1361208605 - 2¹⁴ = 1361192221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59816 + ... + 79374.

It is an arithmetic number, because the mean of its divisors is an integer number (105624000).

Almost surely, 2^1361208605 is an apocalyptic number.

It is an amenable number.

1361208605 is a deficient number, since it is larger than the sum of its proper divisors (328775395).

1361208605 is a wasteful number, since it uses less digits than its factorization.

1361208605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20044.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1361208605 is about 36894.5606424579. The cubic root of 1361208605 is about 1108.2597531318.

The spelling of 1361208605 in words is "one billion, three hundred sixty-one million, two hundred eight thousand, six hundred five".