1340120155 has 32 divisors (see below), whose sum is σ = 1807660800. Its totient is φ = 945329280.

The previous prime is 1340120153. The next prime is 1340120161. The reversal of 1340120155 is 5510210431.

It is a happy number.

It is not a de Polignac number, because 1340120155 - 2¹ = 1340120153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340120153) 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 31 ways as a sum of consecutive naturals, for example, 350484 + ... + 354286.

It is an arithmetic number, because the mean of its divisors is an integer number (56489400).

Almost surely, 2^1340120155 is an apocalyptic number.

1340120155 is a deficient number, since it is larger than the sum of its proper divisors (467540645).

1340120155 is a wasteful number, since it uses less digits than its factorization.

1340120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1340120155 is about 36607.6515908901. The cubic root of 1340120155 is about 1102.5067226380.

Adding to 1340120155 its reverse (5510210431), we get a palindrome (6850330586).

The spelling of 1340120155 in words is "one billion, three hundred forty million, one hundred twenty thousand, one hundred fifty-five".