1340244421 has 16 divisors (see below), whose sum is σ = 1401408000. Its totient is φ = 1280318400.

The previous prime is 1340244397. The next prime is 1340244457. The reversal of 1340244421 is 1244420431.

It is a cyclic number.

It is not a de Polignac number, because 1340244421 - 2¹⁹ = 1339720133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340244461) 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, 825991 + ... + 827611.

It is an arithmetic number, because the mean of its divisors is an integer number (87588000).

Almost surely, 2^1340244421 is an apocalyptic number.

It is an amenable number.

1340244421 is a deficient number, since it is larger than the sum of its proper divisors (61163579).

1340244421 is a wasteful number, since it uses less digits than its factorization.

1340244421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1340244421 is about 36609.3488196663. The cubic root of 1340244421 is about 1102.5407991511.

Adding to 1340244421 its reverse (1244420431), we get a palindrome (2584664852).

The spelling of 1340244421 in words is "one billion, three hundred forty million, two hundred forty-four thousand, four hundred twenty-one".