1365739021281 has 8 divisors (see below), whose sum is σ = 1900158638400. Its totient is φ = 870906042512.

The previous prime is 1365739021267. The next prime is 1365739021289. The reversal of 1365739021281 is 1821209375631.

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 1365739021281 - 2⁶ = 1365739021217 is a prime.

It is a super-2 number, since 2×1365739021281² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1365739021281.

It is not an unprimeable number, because it can be changed into a prime (1365739021289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9896659506 + ... + 9896659643.

It is an arithmetic number, because the mean of its divisors is an integer number (237519829800).

Almost surely, 2^{1365739021281} is an apocalyptic number.

It is an amenable number.

1365739021281 is a deficient number, since it is larger than the sum of its proper divisors (534419617119).

1365739021281 is a wasteful number, since it uses less digits than its factorization.

1365739021281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19793319175.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 1365739021281 in words is "one trillion, three hundred sixty-five billion, seven hundred thirty-nine million, twenty-one thousand, two hundred eighty-one".