1401421824 has 240 divisors, whose sum is σ = 4580175600. Its totient is φ = 424673280.

The previous prime is 1401421793. The next prime is 1401421831. The reversal of 1401421824 is 4281241041.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127401979 + ... + 127401989.

It is an arithmetic number, because the mean of its divisors is an integer number (19084065).

Almost surely, 2^1401421824 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 1401421824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2290087800).

1401421824 is an abundant number, since it is smaller than the sum of its proper divisors (3178753776).

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

1401421824 is an frugal number, since it uses more digits than its factorization.

1401421824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1401421824 is about 37435.5689685625. The cubic root of 1401421824 is about 1119.0675231843.

Adding to 1401421824 its reverse (4281241041), we get a palindrome (5682662865).

The spelling of 1401421824 in words is "one billion, four hundred one million, four hundred twenty-one thousand, eight hundred twenty-four".