1365426561 has 8 divisors (see below), whose sum is σ = 1824680160. Its totient is φ = 908228672.

The previous prime is 1365426539. The next prime is 1365426571. The reversal of 1365426561 is 1656245631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1365426561 - 2⁶ = 1365426497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1365426521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512376 + ... + 515033.

It is an arithmetic number, because the mean of its divisors is an integer number (228085020).

Almost surely, 2^1365426561 is an apocalyptic number.

It is an amenable number.

1365426561 is a deficient number, since it is larger than the sum of its proper divisors (459253599).

1365426561 is a wasteful number, since it uses less digits than its factorization.

1365426561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027855.

The product of its digits is 129600, while the sum is 39.

The square root of 1365426561 is about 36951.6787304718. The cubic root of 1365426561 is about 1109.4032885636.

The spelling of 1365426561 in words is "one billion, three hundred sixty-five million, four hundred twenty-six thousand, five hundred sixty-one".