1340272253 has 4 divisors (see below), whose sum is σ = 1344249660. Its totient is φ = 1336294848.

The previous prime is 1340272249. The next prime is 1340272277. The reversal of 1340272253 is 3522720431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3522720431 = 149 ⋅23642419.

It can be written as a sum of positive squares in 2 ways, for example, as 915788644 + 424483609 = 30262^2 + 20603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340272253 - 2² = 1340272249 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 (1340272243) 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, 1988198 + ... + 1988871.

It is an arithmetic number, because the mean of its divisors is an integer number (336062415).

Almost surely, 2^1340272253 is an apocalyptic number.

It is an amenable number.

1340272253 is a deficient number, since it is larger than the sum of its proper divisors (3977407).

1340272253 is an equidigital number, since it uses as much as digits as its factorization.

1340272253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977406.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 1340272253 is about 36609.7289391768. The cubic root of 1340272253 is about 1102.5484310185.

Adding to 1340272253 its reverse (3522720431), we get a palindrome (4862992684).

The spelling of 1340272253 in words is "one billion, three hundred forty million, two hundred seventy-two thousand, two hundred fifty-three".