1242231 has 4 divisors (see below), whose sum is σ = 1656312. Its totient is φ = 828152.

The previous prime is 1242221. The next prime is 1242233. The reversal of 1242231 is 1322421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1322421 = 3 ⋅440807.

It is a cyclic number.

It is not a de Polignac number, because 1242231 - 2⁶ = 1242167 is a prime.

It is a super-2 number, since 2×1242231² = 3086275714722, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207036 + ... + 207041.

It is an arithmetic number, because the mean of its divisors is an integer number (414078).

2^1242231 is an apocalyptic number.

1242231 is a deficient number, since it is larger than the sum of its proper divisors (414081).

1242231 is an equidigital number, since it uses as much as digits as its factorization.

1242231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414080.

The product of its digits is 96, while the sum is 15.

The square root of 1242231 is about 1114.5541709581. The cubic root of 1242231 is about 107.4980998402.

Adding to 1242231 its reverse (1322421), we get a palindrome (2564652).

The spelling of 1242231 in words is "one million, two hundred forty-two thousand, two hundred thirty-one".