1165634541 has 6 divisors (see below), whose sum is σ = 1683694350. Its totient is φ = 777089688.

The previous prime is 1165634539. The next prime is 1165634647. The reversal of 1165634541 is 1454365611.

1165634541 is a `hidden beast` number, since 1 + 16 + 5 + 634 + 5 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1078137225 + 87497316 = 32835^2 + 9354^2 .

It is not a de Polignac number, because 1165634541 - 2¹ = 1165634539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165634496 and 1165634505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165636541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64757466 + ... + 64757483.

It is an arithmetic number, because the mean of its divisors is an integer number (280615725).

Almost surely, 2^1165634541 is an apocalyptic number.

It is an amenable number.

1165634541 is a deficient number, since it is larger than the sum of its proper divisors (518059809).

1165634541 is a wasteful number, since it uses less digits than its factorization.

1165634541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129514955 (or 129514952 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1165634541 is about 34141.3904374148. The cubic root of 1165634541 is about 1052.4160662620.

It can be divided in two parts, 116563 and 4541, that added together give a square (121104 = 348²).

The spelling of 1165634541 in words is "one billion, one hundred sixty-five million, six hundred thirty-four thousand, five hundred forty-one".