1156340121427 has 4 divisors (see below), whose sum is σ = 1156633092216. Its totient is φ = 1156047150640.

The previous prime is 1156340121407. The next prime is 1156340121437. The reversal of 1156340121427 is 7241210436511.

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

It is a cyclic number.

It is not a de Polignac number, because 1156340121427 - 2¹⁹ = 1156339597139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156340121407) 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, 146479474 + ... + 146487367.

It is an arithmetic number, because the mean of its divisors is an integer number (289158273054).

Almost surely, 2^{1156340121427} is an apocalyptic number.

1156340121427 is a deficient number, since it is larger than the sum of its proper divisors (292970789).

1156340121427 is an equidigital number, since it uses as much as digits as its factorization.

1156340121427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292970788.

The product of its (nonzero) digits is 40320, while the sum is 37.

Adding to 1156340121427 its reverse (7241210436511), we get a palindrome (8397550557938).

The spelling of 1156340121427 in words is "one trillion, one hundred fifty-six billion, three hundred forty million, one hundred twenty-one thousand, four hundred twenty-seven".