1340245357 has 16 divisors (see below), whose sum is σ = 1489052160. Its totient is φ = 1195994800.

The previous prime is 1340245343. The next prime is 1340245363. The reversal of 1340245357 is 7535420431.

It is not a de Polignac number, because 1340245357 - 2⁷ = 1340245229 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 (1340245327) 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 15 ways as a sum of consecutive naturals, for example, 668118 + ... + 670120.

It is an arithmetic number, because the mean of its divisors is an integer number (93065760).

Almost surely, 2^1340245357 is an apocalyptic number.

It is an amenable number.

1340245357 is a deficient number, since it is larger than the sum of its proper divisors (148806803).

1340245357 is a wasteful number, since it uses less digits than its factorization.

1340245357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 1340245357 is about 36609.3616032839. The cubic root of 1340245357 is about 1102.5410558152.

Adding to 1340245357 its reverse (7535420431), we get a palindrome (8875665788).

The spelling of 1340245357 in words is "one billion, three hundred forty million, two hundred forty-five thousand, three hundred fifty-seven".