1340202321 has 16 divisors (see below), whose sum is σ = 2027731200. Its totient is φ = 874457424.

The previous prime is 1340202289. The next prime is 1340202421. The reversal of 1340202321 is 1232020431.

1340202321 is a `hidden beast` number, since 1 + 340 + 2 + 0 + 2 + 321 = 666.

It is not a de Polignac number, because 1340202321 - 2⁵ = 1340202289 is a prime.

It is a super-2 number, since 2×1340202321² = 3592284522427574082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1340202294 and 1340202303.

It is not an unprimeable number, because it can be changed into a prime (1340202121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526786 + ... + 529323.

It is an arithmetic number, because the mean of its divisors is an integer number (126733200).

Almost surely, 2^1340202321 is an apocalyptic number.

It is an amenable number.

1340202321 is a deficient number, since it is larger than the sum of its proper divisors (687528879).

1340202321 is a wasteful number, since it uses less digits than its factorization.

1340202321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056165 (or 1056159 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1340202321 is about 36608.7738254097. The cubic root of 1340202321 is about 1102.5292546266.

Adding to 1340202321 its reverse (1232020431), we get a palindrome (2572222752).

The spelling of 1340202321 in words is "one billion, three hundred forty million, two hundred two thousand, three hundred twenty-one".