861266 has 8 divisors (see below), whose sum is σ = 1476480. Its totient is φ = 369108.

The previous prime is 861239. The next prime is 861293. The reversal of 861266 is 662168.

It is an interprime number because it is at equal distance from previous prime (861239) and next prime (861293).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30746 + ... + 30773.

It is an arithmetic number, because the mean of its divisors is an integer number (184560).

2⁸⁶¹²⁶⁶ is an apocalyptic number.

861266 is a deficient number, since it is larger than the sum of its proper divisors (615214).

861266 is a wasteful number, since it uses less digits than its factorization.

861266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61528.

The product of its digits is 3456, while the sum is 29.

The square root of 861266 is about 928.0441799828. The cubic root of 861266 is about 95.1434950566.

The spelling of 861266 in words is "eight hundred sixty-one thousand, two hundred sixty-six".