1156647427 has 4 divisors (see below), whose sum is σ = 1245620320. Its totient is φ = 1067674536.

The previous prime is 1156647409. The next prime is 1156647451. The reversal of 1156647427 is 7247466511.

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 1156647427 - 2¹⁵ = 1156614659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156647127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44486427 + ... + 44486452.

It is an arithmetic number, because the mean of its divisors is an integer number (311405080).

Almost surely, 2^1156647427 is an apocalyptic number.

1156647427 is a deficient number, since it is larger than the sum of its proper divisors (88972893).

1156647427 is an equidigital number, since it uses as much as digits as its factorization.

1156647427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88972892.

The product of its digits is 282240, while the sum is 43.

The square root of 1156647427 is about 34009.5196525914. The cubic root of 1156647427 is about 1049.7043542542.

The spelling of 1156647427 in words is "one billion, one hundred fifty-six million, six hundred forty-seven thousand, four hundred twenty-seven".