1401321144 has 32 divisors (see below), whose sum is σ = 3504240000. Its totient is φ = 466982112.

The previous prime is 1401321143. The next prime is 1401321157. The reversal of 1401321144 is 4411231041.

It is a self number, because there is not a number n which added to its sum of digits gives 1401321144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401321143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144067 + ... + 153485.

It is an arithmetic number, because the mean of its divisors is an integer number (109507500).

Almost surely, 2^1401321144 is an apocalyptic number.

It is an amenable number.

1401321144 is an abundant number, since it is smaller than the sum of its proper divisors (2102918856).

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

1401321144 is a wasteful number, since it uses less digits than its factorization.

1401321144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15627 (or 15623 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1401321144 is about 37434.2242339814. The cubic root of 1401321144 is about 1119.0407241115.

Adding to 1401321144 its reverse (4411231041), we get a palindrome (5812552185).

The spelling of 1401321144 in words is "one billion, four hundred one million, three hundred twenty-one thousand, one hundred forty-four".