1242324121 has 4 divisors (see below), whose sum is σ = 1253721700. Its totient is φ = 1230926544.

The previous prime is 1242324107. The next prime is 1242324131. The reversal of 1242324121 is 1214232421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 523494400 + 718829721 = 22880^2 + 26811^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242324121 - 2⁹ = 1242323609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242324092 and 1242324101.

It is not an unprimeable number, because it can be changed into a prime (1242324131) 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, 5698626 + ... + 5698843.

It is an arithmetic number, because the mean of its divisors is an integer number (313430425).

Almost surely, 2^1242324121 is an apocalyptic number.

It is an amenable number.

1242324121 is a deficient number, since it is larger than the sum of its proper divisors (11397579).

1242324121 is a wasteful number, since it uses less digits than its factorization.

1242324121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11397578.

The product of its digits is 768, while the sum is 22.

The square root of 1242324121 is about 35246.6185754038. The cubic root of 1242324121 is about 1075.0078588933.

Adding to 1242324121 its reverse (1214232421), we get a palindrome (2456556542).

The spelling of 1242324121 in words is "one billion, two hundred forty-two million, three hundred twenty-four thousand, one hundred twenty-one".