1242215441 has 16 divisors (see below), whose sum is σ = 1330024320. Its totient is φ = 1157587200.

The previous prime is 1242215423. The next prime is 1242215549. The reversal of 1242215441 is 1445122421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242215441 is a prime.

It is a super-3 number, since 3×1242215441³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242215441.

It is not an unprimeable number, because it can be changed into a prime (1242212441) 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 15 ways as a sum of consecutive naturals, for example, 149291 + ... + 157391.

It is an arithmetic number, because the mean of its divisors is an integer number (83126520).

Almost surely, 2^1242215441 is an apocalyptic number.

It is an amenable number.

1242215441 is a deficient number, since it is larger than the sum of its proper divisors (87808879).

1242215441 is a wasteful number, since it uses less digits than its factorization.

1242215441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8296.

The product of its digits is 2560, while the sum is 26.

The square root of 1242215441 is about 35245.0768335097. The cubic root of 1242215441 is about 1074.9765103214.

Adding to 1242215441 its reverse (1445122421), we get a palindrome (2687337862).

The spelling of 1242215441 in words is "one billion, two hundred forty-two million, two hundred fifteen thousand, four hundred forty-one".