1401002321 has 4 divisors (see below), whose sum is σ = 1402593444. Its totient is φ = 1399411200.

The previous prime is 1401002293. The next prime is 1401002327. The reversal of 1401002321 is 1232001041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 580810000 + 820192321 = 24100^2 + 28639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401002321 - 2³⁰ = 327260497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401002296 and 1401002305.

It is not an unprimeable number, because it can be changed into a prime (1401002327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794240 + ... + 796001.

It is an arithmetic number, because the mean of its divisors is an integer number (350648361).

Almost surely, 2^1401002321 is an apocalyptic number.

It is an amenable number.

1401002321 is a deficient number, since it is larger than the sum of its proper divisors (1591123).

1401002321 is an equidigital number, since it uses as much as digits as its factorization.

1401002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591122.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1401002321 is about 37429.9655490090. The cubic root of 1401002321 is about 1118.9558511131.

Adding to 1401002321 its reverse (1232001041), we get a palindrome (2633003362).

The spelling of 1401002321 in words is "one billion, four hundred one million, two thousand, three hundred twenty-one".