1136561 has 8 divisors (see below), whose sum is σ = 1226400. Its totient is φ = 1049760.

The previous prime is 1136557. The next prime is 1136567. The reversal of 1136561 is 1656311.

It is a happy number.

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 1136561 - 2² = 1136557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1136567) 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 7 ways as a sum of consecutive naturals, for example, 50 + ... + 1508.

It is an arithmetic number, because the mean of its divisors is an integer number (153300).

2^1136561 is an apocalyptic number.

It is an amenable number.

1136561 is a deficient number, since it is larger than the sum of its proper divisors (89839).

1136561 is a wasteful number, since it uses less digits than its factorization.

1136561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519.

The product of its digits is 540, while the sum is 23.

The square root of 1136561 is about 1066.0961495100. The cubic root of 1136561 is about 104.3592421261.

The spelling of 1136561 in words is "one million, one hundred thirty-six thousand, five hundred sixty-one".