1221451230 has 16 divisors (see below), whose sum is σ = 2931483024. Its totient is φ = 325720320.

The previous prime is 1221451229. The next prime is 1221451237. The reversal of 1221451230 is 321541221.

It is a Curzon number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1221451197 and 1221451206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221451237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20357491 + ... + 20357550.

It is an arithmetic number, because the mean of its divisors is an integer number (183217689).

Almost surely, 2^1221451230 is an apocalyptic number.

1221451230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221451230 is an abundant number, since it is smaller than the sum of its proper divisors (1710031794).

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

1221451230 is a wasteful number, since it uses less digits than its factorization.

1221451230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40715051.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1221451230 is about 34949.2665159085. The cubic root of 1221451230 is about 1068.9532459805.

Adding to 1221451230 its reverse (321541221), we get a palindrome (1542992451).

The spelling of 1221451230 in words is "one billion, two hundred twenty-one million, four hundred fifty-one thousand, two hundred thirty".