1242220434 has 64 divisors (see below), whose sum is σ = 3122896896. Its totient is φ = 320641344.

The previous prime is 1242220433. The next prime is 1242220453. The reversal of 1242220434 is 4340222421.

It is a super-2 number, since 2×1242220434² = 3086223213294296712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242220433) 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 31 ways as a sum of consecutive naturals, for example, 1459 + ... + 49865.

It is an arithmetic number, because the mean of its divisors is an integer number (48795264).

Almost surely, 2^1242220434 is an apocalyptic number.

1242220434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242220434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1561448448).

1242220434 is an abundant number, since it is smaller than the sum of its proper divisors (1880676462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242220434 is a wasteful number, since it uses less digits than its factorization.

1242220434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48479.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1242220434 is about 35245.1476660263. The cubic root of 1242220434 is about 1074.9779505843.

Adding to 1242220434 its reverse (4340222421), we get a palindrome (5582442855).

The spelling of 1242220434 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, four hundred thirty-four".