1162143261 has 32 divisors (see below), whose sum is σ = 1738464000. Its totient is φ = 767257920.

The previous prime is 1162143259. The next prime is 1162143289. The reversal of 1162143261 is 1623412611.

It is a happy number.

1162143261 is a `hidden beast` number, since 1 + 1 + 621 + 4 + 32 + 6 + 1 = 666.

It is not a de Polignac number, because 1162143261 - 2¹ = 1162143259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1162143061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1939840 + ... + 1940438.

It is an arithmetic number, because the mean of its divisors is an integer number (54327000).

Almost surely, 2^1162143261 is an apocalyptic number.

It is an amenable number.

1162143261 is a deficient number, since it is larger than the sum of its proper divisors (576320739).

1162143261 is a wasteful number, since it uses less digits than its factorization.

1162143261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186 (or 1180 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1162143261 is about 34090.2223665379. Note that the first 3 decimals coincide. The cubic root of 1162143261 is about 1051.3642918790.

Adding to 1162143261 its reverse (1623412611), we get a palindrome (2785555872).

The spelling of 1162143261 in words is "one billion, one hundred sixty-two million, one hundred forty-three thousand, two hundred sixty-one".