281398261 has 8 divisors (see below), whose sum is σ = 296662464. Its totient is φ = 266386560.

The previous prime is 281398241. The next prime is 281398267. The reversal of 281398261 is 162893182.

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 281398261 - 2⁹ = 281397749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281398267) 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, 60835 + ... + 65296.

It is an arithmetic number, because the mean of its divisors is an integer number (37082808).

Almost surely, 2^281398261 is an apocalyptic number.

It is an amenable number.

281398261 is a deficient number, since it is larger than the sum of its proper divisors (15264203).

281398261 is a wasteful number, since it uses less digits than its factorization.

281398261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126251.

The product of its digits is 41472, while the sum is 40.

The square root of 281398261 is about 16774.9295378550. The cubic root of 281398261 is about 655.3004553624.

The spelling of 281398261 in words is "two hundred eighty-one million, three hundred ninety-eight thousand, two hundred sixty-one".