1421017344 has 216 divisors, whose sum is σ = 4339101312. Its totient is φ = 463656960.

The previous prime is 1421017333. The next prime is 1421017363. The reversal of 1421017344 is 4437101241.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 3296809 + ... + 3297239.

It is an arithmetic number, because the mean of its divisors is an integer number (20088432).

Almost surely, 2^1421017344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421017344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2169550656).

1421017344 is an abundant number, since it is smaller than the sum of its proper divisors (2918083968).

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

1421017344 is an frugal number, since it uses more digits than its factorization.

1421017344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1421017344 is about 37696.3836992357. The cubic root of 1421017344 is about 1124.2592243305.

Adding to 1421017344 its reverse (4437101241), we get a palindrome (5858118585).

The spelling of 1421017344 in words is "one billion, four hundred twenty-one million, seventeen thousand, three hundred forty-four".