1351320243 has 16 divisors (see below), whose sum is σ = 2217551616. Its totient is φ = 712784160.

The previous prime is 1351320239. The next prime is 1351320263. The reversal of 1351320243 is 3420231531.

It is not a de Polignac number, because 1351320243 - 2² = 1351320239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1351320203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2474673 + ... + 2475218.

It is an arithmetic number, because the mean of its divisors is an integer number (138596976).

Almost surely, 2^1351320243 is an apocalyptic number.

1351320243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1351320243 is a deficient number, since it is larger than the sum of its proper divisors (866231373).

1351320243 is a wasteful number, since it uses less digits than its factorization.

1351320243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949914.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1351320243 is about 36760.3079829318. The cubic root of 1351320243 is about 1105.5696149346.

Adding to 1351320243 its reverse (3420231531), we get a palindrome (4771551774).

The spelling of 1351320243 in words is "one billion, three hundred fifty-one million, three hundred twenty thousand, two hundred forty-three".