1242311 has 4 divisors (see below), whose sum is σ = 1419792. Its totient is φ = 1064832.

The previous prime is 1242289. The next prime is 1242317. The reversal of 1242311 is 1132421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242311 - 2¹⁴ = 1225927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88730 + ... + 88743.

It is an arithmetic number, because the mean of its divisors is an integer number (354948).

2^1242311 is an apocalyptic number.

1242311 is a deficient number, since it is larger than the sum of its proper divisors (177481).

1242311 is an equidigital number, since it uses as much as digits as its factorization.

1242311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177480.

The product of its digits is 48, while the sum is 14.

The square root of 1242311 is about 1114.5900591697. The cubic root of 1242311 is about 107.5004074259.

Adding to 1242311 its reverse (1132421), we get a palindrome (2374732).

The spelling of 1242311 in words is "one million, two hundred forty-two thousand, three hundred eleven".