1340500321 has 4 divisors (see below), whose sum is σ = 1386724500. Its totient is φ = 1294276144.

The previous prime is 1340500319. The next prime is 1340500333. The reversal of 1340500321 is 1230050431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230050431 = 5527 ⋅222553.

It can be written as a sum of positive squares in 2 ways, for example, as 954810000 + 385690321 = 30900^2 + 19639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340500321 - 2¹ = 1340500319 is a prime.

It is a super-2 number, since 2×1340500321² = 3593882221202206082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340500351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23112046 + ... + 23112103.

It is an arithmetic number, because the mean of its divisors is an integer number (346681125).

Almost surely, 2^1340500321 is an apocalyptic number.

It is an amenable number.

1340500321 is a deficient number, since it is larger than the sum of its proper divisors (46224179).

1340500321 is an equidigital number, since it uses as much as digits as its factorization.

1340500321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46224178.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1340500321 is about 36612.8436617535. The cubic root of 1340500321 is about 1102.6109660130.

Adding to 1340500321 its reverse (1230050431), we get a palindrome (2570550752).

The spelling of 1340500321 in words is "one billion, three hundred forty million, five hundred thousand, three hundred twenty-one".