1421264646 has 48 divisors (see below), whose sum is σ = 3176222400. Its totient is φ = 458970624.

The previous prime is 1421264623. The next prime is 1421264687. The reversal of 1421264646 is 6464621241.

1421264646 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 2 + 6 + 4 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1421264646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154710 + ... + 163638.

It is an arithmetic number, because the mean of its divisors is an integer number (66171300).

Almost surely, 2^1421264646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421264646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588111200).

1421264646 is an abundant number, since it is smaller than the sum of its proper divisors (1754957754).

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

1421264646 is a wasteful number, since it uses less digits than its factorization.

1421264646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213 (or 9210 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 1421264646 is about 37699.6637385534. The cubic root of 1421264646 is about 1124.3244394453.

Adding to 1421264646 its reverse (6464621241), we get a palindrome (7885885887).

The spelling of 1421264646 in words is "one billion, four hundred twenty-one million, two hundred sixty-four thousand, six hundred forty-six".