1402130321 has 4 divisors (see below), whose sum is σ = 1402411572. Its totient is φ = 1401849072.

The previous prime is 1402130311. The next prime is 1402130333. The reversal of 1402130321 is 1230312041.

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 1149955921 + 252174400 = 33911^2 + 15880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402130321 - 2¹⁰ = 1402129297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1402130321.

It is not an unprimeable number, because it can be changed into a prime (1402130311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133010 + ... + 143163.

It is an arithmetic number, because the mean of its divisors is an integer number (350602893).

Almost surely, 2^1402130321 is an apocalyptic number.

It is an amenable number.

1402130321 is a deficient number, since it is larger than the sum of its proper divisors (281251).

1402130321 is an equidigital number, since it uses as much as digits as its factorization.

1402130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281250.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1402130321 is about 37445.0306582863. The cubic root of 1402130321 is about 1119.2560751239.

Adding to 1402130321 its reverse (1230312041), we get a palindrome (2632442362).

The spelling of 1402130321 in words is "one billion, four hundred two million, one hundred thirty thousand, three hundred twenty-one".