1368059521 has 4 divisors (see below), whose sum is σ = 1380845232. Its totient is φ = 1355273812.

The previous prime is 1368059509. The next prime is 1368059551. The reversal of 1368059521 is 1259508631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1368059521 - 2⁹ = 1368059009 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368059501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6392695 + ... + 6392908.

It is an arithmetic number, because the mean of its divisors is an integer number (345211308).

Almost surely, 2^1368059521 is an apocalyptic number.

It is an amenable number.

1368059521 is a deficient number, since it is larger than the sum of its proper divisors (12785711).

1368059521 is a wasteful number, since it uses less digits than its factorization.

1368059521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12785710.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 1368059521 is about 36987.2886408290. The cubic root of 1368059521 is about 1110.1159203126.

The spelling of 1368059521 in words is "one billion, three hundred sixty-eight million, fifty-nine thousand, five hundred twenty-one".