1129661 has 8 divisors (see below), whose sum is σ = 1228920. Its totient is φ = 1032192.

The previous prime is 1129643. The next prime is 1129663. The reversal of 1129661 is 1669211.

It can be written as a sum of positive squares in 4 ways, for example, as 37636 + 1092025 = 194^2 + 1045^2 .

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 1129661 - 2¹⁰ = 1128637 is a prime.

It is a super-2 number, since 2×1129661² = 2552267949842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (153615).

2^1129661 is an apocalyptic number.

It is an amenable number.

1129661 is a deficient number, since it is larger than the sum of its proper divisors (99259).

1129661 is a wasteful number, since it uses less digits than its factorization.

1129661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895.

The product of its digits is 648, while the sum is 26.

The square root of 1129661 is about 1062.8551171256. The cubic root of 1129661 is about 104.1476268845.

The spelling of 1129661 in words is "one million, one hundred twenty-nine thousand, six hundred sixty-one".