1243281 has 16 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 752640.

The previous prime is 1243273. The next prime is 1243309. The reversal of 1243281 is 1823421.

It is not a de Polignac number, because 1243281 - 2³ = 1243273 is a prime.

It is a super-3 number, since 3×1243281³ = 5765396033324271123, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2545 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2^1243281 is an apocalyptic number.

It is an amenable number.

1243281 is a deficient number, since it is larger than the sum of its proper divisors (571119).

1243281 is a wasteful number, since it uses less digits than its factorization.

1243281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its digits is 384, while the sum is 21.

The square root of 1243281 is about 1115.0251118248. The cubic root of 1243281 is about 107.5283790228.

The spelling of 1243281 in words is "one million, two hundred forty-three thousand, two hundred eighty-one".