1156564541 has 4 divisors (see below), whose sum is σ = 1261706784. Its totient is φ = 1051422300.

The previous prime is 1156564517. The next prime is 1156564571. The reversal of 1156564541 is 1454656511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1156564541 - 2¹⁴ = 1156548157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1156564495 and 1156564504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156564501) 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, 52571105 + ... + 52571126.

It is an arithmetic number, because the mean of its divisors is an integer number (315426696).

Almost surely, 2^1156564541 is an apocalyptic number.

1156564541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1156564541 is a deficient number, since it is larger than the sum of its proper divisors (105142243).

1156564541 is a wasteful number, since it uses less digits than its factorization.

1156564541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105142242.

The product of its digits is 72000, while the sum is 38.

The square root of 1156564541 is about 34008.3010601824. The cubic root of 1156564541 is about 1049.6792795220.

It can be divided in two parts, 115 and 6564541, that added together give a palindrome (6564656).

The spelling of 1156564541 in words is "one billion, one hundred fifty-six million, five hundred sixty-four thousand, five hundred forty-one".