1365240553 has 4 divisors (see below), whose sum is σ = 1365753220. Its totient is φ = 1364727888.

The previous prime is 1365240529. The next prime is 1365240557. The reversal of 1365240553 is 3550425631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3550425631 = 6317 ⋅562043.

It can be written as a sum of positive squares in 2 ways, for example, as 28387584 + 1336852969 = 5328^2 + 36563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1365240553 - 2¹⁷ = 1365109481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1365240557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252318 + ... + 257671.

It is an arithmetic number, because the mean of its divisors is an integer number (341438305).

Almost surely, 2^1365240553 is an apocalyptic number.

It is an amenable number.

1365240553 is a deficient number, since it is larger than the sum of its proper divisors (512667).

1365240553 is an equidigital number, since it uses as much as digits as its factorization.

1365240553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512666.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 1365240553 is about 36949.1617360936. The cubic root of 1365240553 is about 1109.3529093722.

The spelling of 1365240553 in words is "one billion, three hundred sixty-five million, two hundred forty thousand, five hundred fifty-three".