1143282261 has 16 divisors (see below), whose sum is σ = 1671671808. Its totient is φ = 689266800.

The previous prime is 1143282197. The next prime is 1143282293. The reversal of 1143282261 is 1622823411.

It is not a de Polignac number, because 1143282261 - 2⁶ = 1143282197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143282461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84391 + ... + 96996.

It is an arithmetic number, because the mean of its divisors is an integer number (104479488).

Almost surely, 2^1143282261 is an apocalyptic number.

1143282261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143282261 is a deficient number, since it is larger than the sum of its proper divisors (528389547).

1143282261 is a wasteful number, since it uses less digits than its factorization.

1143282261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181592.

The product of its digits is 4608, while the sum is 30.

The square root of 1143282261 is about 33812.4571866642. The cubic root of 1143282261 is about 1045.6455375161.

The spelling of 1143282261 in words is "one billion, one hundred forty-three million, two hundred eighty-two thousand, two hundred sixty-one".