1402130421 has 6 divisors (see below), whose sum is σ = 2025299510. Its totient is φ = 934753608.

The previous prime is 1402130413. The next prime is 1402130447. The reversal of 1402130421 is 1240312041.

It can be written as a sum of positive squares in only one way, i.e., 1356080625 + 46049796 = 36825^2 + 6786^2 .

It is not a de Polignac number, because 1402130421 - 2³ = 1402130413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1402130394 and 1402130403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402130021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77896126 + ... + 77896143.

Almost surely, 2^1402130421 is an apocalyptic number.

It is an amenable number.

1402130421 is a deficient number, since it is larger than the sum of its proper divisors (623169089).

1402130421 is a wasteful number, since it uses less digits than its factorization.

1402130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155792275 (or 155792272 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1402130421 is about 37445.0319935769. The cubic root of 1402130421 is about 1119.2561017324.

Adding to 1402130421 its reverse (1240312041), we get a palindrome (2642442462).

The spelling of 1402130421 in words is "one billion, four hundred two million, one hundred thirty thousand, four hundred twenty-one".