1161643 has 12 divisors (see below), whose sum is σ = 1368912. Its totient is φ = 982800.

The previous prime is 1161637. The next prime is 1161647. The reversal of 1161643 is 3461611.

It is a happy number.

It is not a de Polignac number, because 1161643 - 2¹⁷ = 1030571 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7321 + ... + 7477.

It is an arithmetic number, because the mean of its divisors is an integer number (114076).

2^1161643 is an apocalyptic number.

1161643 is a deficient number, since it is larger than the sum of its proper divisors (207269).

1161643 is a wasteful number, since it uses less digits than its factorization.

1161643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 315 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1161643 is about 1077.7954351360. The cubic root of 1161643 is about 105.1213412019.

Subtracting 1161643 from its reverse (3461611), we obtain a cube (2299968 = 132³).

The spelling of 1161643 in words is "one million, one hundred sixty-one thousand, six hundred forty-three".