1340544253 has 8 divisors (see below), whose sum is σ = 1385429760. Its totient is φ = 1295761440.

The previous prime is 1340544229. The next prime is 1340544263. The reversal of 1340544253 is 3524450431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340544253 - 2⁹ = 1340543741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340544223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338 + ... + 51796.

It is an arithmetic number, because the mean of its divisors is an integer number (173178720).

Almost surely, 2^1340544253 is an apocalyptic number.

It is an amenable number.

1340544253 is a deficient number, since it is larger than the sum of its proper divisors (44885507).

1340544253 is an equidigital number, since it uses as much as digits as its factorization.

1340544253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51347.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 1340544253 is about 36613.4436102369. The cubic root of 1340544253 is about 1102.6230111116.

Adding to 1340544253 its reverse (3524450431), we get a palindrome (4864994684).

The spelling of 1340544253 in words is "one billion, three hundred forty million, five hundred forty-four thousand, two hundred fifty-three".