1242440153 has 8 divisors (see below), whose sum is σ = 1309189920. Its totient is φ = 1175826240.

The previous prime is 1242440149. The next prime is 1242440203. The reversal of 1242440153 is 3510442421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242440153 - 2² = 1242440149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242442153) 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 7 ways as a sum of consecutive naturals, for example, 14903 + ... + 52028.

It is an arithmetic number, because the mean of its divisors is an integer number (163648740).

Almost surely, 2^1242440153 is an apocalyptic number.

It is an amenable number.

1242440153 is a deficient number, since it is larger than the sum of its proper divisors (66749767).

1242440153 is an equidigital number, since it uses as much as digits as its factorization.

1242440153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67927.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1242440153 is about 35248.2645388394. The cubic root of 1242440153 is about 1075.0413261200.

Adding to 1242440153 its reverse (3510442421), we get a palindrome (4752882574).

The spelling of 1242440153 in words is "one billion, two hundred forty-two million, four hundred forty thousand, one hundred fifty-three".