1242281 has 4 divisors (see below), whose sum is σ = 1245012. Its totient is φ = 1239552.

The previous prime is 1242271. The next prime is 1242289. The reversal of 1242281 is 1822421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1822421 = 1163 ⋅1567.

It can be written as a sum of positive squares in 2 ways, for example, as 739600 + 502681 = 860^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242281 - 2⁶ = 1242217 is a prime.

It is a super-2 number, since 2×1242281² = 3086524165922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1242289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (311253).

2^1242281 is an apocalyptic number.

It is an amenable number.

1242281 is a deficient number, since it is larger than the sum of its proper divisors (2731).

1242281 is an equidigital number, since it uses as much as digits as its factorization.

1242281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730.

The product of its digits is 256, while the sum is 20.

The square root of 1242281 is about 1114.5766012258. The cubic root of 1242281 is about 107.4995420929.

The spelling of 1242281 in words is "one million, two hundred forty-two thousand, two hundred eighty-one".