1156056005 has 32 divisors (see below), whose sum is σ = 1517902848. Its totient is φ = 840153600.

The previous prime is 1156055987. The next prime is 1156056017. The reversal of 1156056005 is 5006506511.

It is not a de Polignac number, because 1156056005 - 2⁶ = 1156055941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1166060 + ... + 1167050.

It is an arithmetic number, because the mean of its divisors is an integer number (47434464).

Almost surely, 2^1156056005 is an apocalyptic number.

It is an amenable number.

1156056005 is a deficient number, since it is larger than the sum of its proper divisors (361846843).

1156056005 is a wasteful number, since it uses less digits than its factorization.

1156056005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1156056005 is about 34000.8235929661. The cubic root of 1156056005 is about 1049.5254106172.

The spelling of 1156056005 in words is "one billion, one hundred fifty-six million, fifty-six thousand, five".