281123249 has 8 divisors (see below), whose sum is σ = 309022560. Its totient is φ = 253614400.

The previous prime is 281123233. The next prime is 281123251. The reversal of 281123249 is 942321182.

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 281123249 - 2⁴ = 281123233 is a prime.

It is a super-2 number, since 2×281123249² = 158060562256632002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (281128249) 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, 96104 + ... + 98985.

It is an arithmetic number, because the mean of its divisors is an integer number (38627820).

Almost surely, 2^281123249 is an apocalyptic number.

It is an amenable number.

281123249 is a deficient number, since it is larger than the sum of its proper divisors (27899311).

281123249 is a wasteful number, since it uses less digits than its factorization.

281123249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195231.

The product of its digits is 6912, while the sum is 32.

The square root of 281123249 is about 16766.7304206873. The cubic root of 281123249 is about 655.0869095874.

The spelling of 281123249 in words is "two hundred eighty-one million, one hundred twenty-three thousand, two hundred forty-nine".