1340072449 has 3 divisors (see below), whose sum is σ = 1340109057. Its totient is φ = 1340035842.

The previous prime is 1340072443. The next prime is 1340072453. The reversal of 1340072449 is 9442700431.

It is a happy number.

The square root of 1340072449 is 36607.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1340072449 - 2⁵ = 1340072417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340072443) 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 2 ways as a sum of consecutive naturals, for example, 18304 + ... + 54910.

It is an arithmetic number, because the mean of its divisors is an integer number (446703019).

Almost surely, 2^1340072449 is an apocalyptic number.

1340072449 is the 36607-th square number.

1340072449 is the 18304-th centered octagonal number.

It is an amenable number.

1340072449 is a deficient number, since it is larger than the sum of its proper divisors (36608).

1340072449 is an frugal number, since it uses more digits than its factorization.

1340072449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73214 (or 36607 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The cubic root of 1340072449 is about 1102.4936400276.

It can be divided in two parts, 13400 and 72449, that added together give a square (85849 = 293²).

The spelling of 1340072449 in words is "one billion, three hundred forty million, seventy-two thousand, four hundred forty-nine".