1421021224 has 64 divisors (see below), whose sum is σ = 3100930560. Its totient is φ = 597896640.

The previous prime is 1421021201. The next prime is 1421021227. The reversal of 1421021224 is 4221201241.

It is not an unprimeable number, because it can be changed into a prime (1421021227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1751779 + ... + 1752589.

It is an arithmetic number, because the mean of its divisors is an integer number (48452040).

Almost surely, 2^1421021224 is an apocalyptic number.

1421021224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421021224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550465280).

1421021224 is an abundant number, since it is smaller than the sum of its proper divisors (1679909336).

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

1421021224 is a wasteful number, since it uses less digits than its factorization.

1421021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1421021224 is about 37696.4351630230. The cubic root of 1421021224 is about 1124.2602475697.

Adding to 1421021224 its reverse (4221201241), we get a palindrome (5642222465).

The spelling of 1421021224 in words is "one billion, four hundred twenty-one million, twenty-one thousand, two hundred twenty-four".