1156506005 has 8 divisors (see below), whose sum is σ = 1469443032. Its totient is φ = 870780928.

The previous prime is 1156505963. The next prime is 1156506019. The reversal of 1156506005 is 5006056511.

It can be written as a sum of positive squares in 4 ways, for example, as 426587716 + 729918289 = 20654^2 + 27017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156506005 - 2¹⁰ = 1156504981 is a prime.

It is a super-2 number, since 2×1156506005² = 2675012279202120050, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 6802892 + ... + 6803061.

It is an arithmetic number, because the mean of its divisors is an integer number (183680379).

Almost surely, 2^1156506005 is an apocalyptic number.

It is an amenable number.

1156506005 is a deficient number, since it is larger than the sum of its proper divisors (312937027).

1156506005 is a wasteful number, since it uses less digits than its factorization.

1156506005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605975.

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

The square root of 1156506005 is about 34007.4404358811. The cubic root of 1156506005 is about 1049.6615704474.

The spelling of 1156506005 in words is "one billion, one hundred fifty-six million, five hundred six thousand, five".