1242221430 has 32 divisors (see below), whose sum is σ = 3007723104. Its totient is φ = 328326656.

The previous prime is 1242221423. The next prime is 1242221437. The reversal of 1242221430 is 341222421.

It is an interprime number because it is at equal distance from previous prime (1242221423) and next prime (1242221437).

It is a super-2 number, since 2×1242221430² = 3086228162302489800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242221397 and 1242221406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242221437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179829 + ... + 186608.

It is an arithmetic number, because the mean of its divisors is an integer number (93991347).

Almost surely, 2^1242221430 is an apocalyptic number.

1242221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242221430 is an abundant number, since it is smaller than the sum of its proper divisors (1765501674).

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

1242221430 is a wasteful number, since it uses less digits than its factorization.

1242221430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366560.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1242221430 is about 35245.1617956281. The cubic root of 1242221430 is about 1074.9782378865.

Adding to 1242221430 its reverse (341222421), we get a palindrome (1583443851).

Subtracting from 1242221430 its reverse (341222421), we obtain a palindrome (900999009).

The spelling of 1242221430 in words is "one billion, two hundred forty-two million, two hundred twenty-one thousand, four hundred thirty".