1242215554 has 16 divisors (see below), whose sum is σ = 1978757280. Its totient is φ = 583208640.

The previous prime is 1242215549. The next prime is 1242215561. The reversal of 1242215554 is 4555122421.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 140352 + ... + 148939.

It is an arithmetic number, because the mean of its divisors is an integer number (123672330).

Almost surely, 2^1242215554 is an apocalyptic number.

1242215554 is a deficient number, since it is larger than the sum of its proper divisors (736541726).

1242215554 is a wasteful number, since it uses less digits than its factorization.

1242215554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289425.

The product of its digits is 16000, while the sum is 31.

The square root of 1242215554 is about 35245.0784365704. The cubic root of 1242215554 is about 1074.9765429170.

Adding to 1242215554 its reverse (4555122421), we get a palindrome (5797337975).

The spelling of 1242215554 in words is "one billion, two hundred forty-two million, two hundred fifteen thousand, five hundred fifty-four".