260981 has 8 divisors (see below), whose sum is σ = 311424. Its totient is φ = 213840.

The previous prime is 260969. The next prime is 260983. The reversal of 260981 is 189062.

260981 = T₁₃₉ + T₁₄₀ + ... + T₁₆₁.

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

It is a cyclic number.

It is not a de Polignac number, because 260981 - 2¹⁴ = 244597 is a prime.

It is a super-2 number, since 2×260981² = 136222164722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (38928).

2²⁶⁰⁹⁸¹ is an apocalyptic number.

It is an amenable number.

260981 is a deficient number, since it is larger than the sum of its proper divisors (50443).

260981 is a wasteful number, since it uses less digits than its factorization.

260981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 260981 is about 510.8629953324. The cubic root of 260981 is about 63.9052145075.

The spelling of 260981 in words is "two hundred sixty thousand, nine hundred eighty-one".