1344345257 has 4 divisors (see below), whose sum is σ = 1390702020. Its totient is φ = 1297988496.

The previous prime is 1344345253. The next prime is 1344345259. The reversal of 1344345257 is 7525434431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 635241616 + 709103641 = 25204^2 + 26629^2 .

It is not a de Polignac number, because 1344345257 - 2² = 1344345253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1344345257.

It is not an unprimeable number, because it can be changed into a prime (1344345251) 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, 23178338 + ... + 23178395.

It is an arithmetic number, because the mean of its divisors is an integer number (347675505).

Almost surely, 2^1344345257 is an apocalyptic number.

It is an amenable number.

1344345257 is a deficient number, since it is larger than the sum of its proper divisors (46356763).

1344345257 is an equidigital number, since it uses as much as digits as its factorization.

1344345257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46356762.

The product of its digits is 201600, while the sum is 38.

The square root of 1344345257 is about 36665.3140856587. The cubic root of 1344345257 is about 1103.6641602678.

Adding to 1344345257 its reverse (7525434431), we get a palindrome (8869779688).

The spelling of 1344345257 in words is "one billion, three hundred forty-four million, three hundred forty-five thousand, two hundred fifty-seven".