860143261 has 4 divisors (see below), whose sum is σ = 860569632. Its totient is φ = 859716892.

The previous prime is 860143189. The next prime is 860143279. The reversal of 860143261 is 162341068.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 860143261 - 2⁷ = 860143133 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860143561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210145 + ... + 214198.

It is an arithmetic number, because the mean of its divisors is an integer number (215142408).

Almost surely, 2^860143261 is an apocalyptic number.

It is an amenable number.

860143261 is a deficient number, since it is larger than the sum of its proper divisors (426371).

860143261 is a wasteful number, since it uses less digits than its factorization.

860143261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426370.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 860143261 is about 29328.1990752927. The cubic root of 860143261 is about 951.0213432981.

The spelling of 860143261 in words is "eight hundred sixty million, one hundred forty-three thousand, two hundred sixty-one".