1156342013 has 2 divisors, whose sum is σ = 1156342014. Its totient is φ = 1156342012.

The previous prime is 1156341959. The next prime is 1156342021. The reversal of 1156342013 is 3102436511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1148735449 + 7606564 = 33893^2 + 2758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156342013 - 2¹⁶ = 1156276477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156342063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578171006 + 578171007.

It is an arithmetic number, because the mean of its divisors is an integer number (578171007).

Almost surely, 2^1156342013 is an apocalyptic number.

It is an amenable number.

1156342013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156342013 is an equidigital number, since it uses as much as digits as its factorization.

1156342013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1156342013 is about 34005.0292309829. The cubic root of 1156342013 is about 1049.6119542655.

Adding to 1156342013 its reverse (3102436511), we get a palindrome (4258778524).

The spelling of 1156342013 in words is "one billion, one hundred fifty-six million, three hundred forty-two thousand, thirteen".