2040142421 has 2 divisors, whose sum is σ = 2040142422. Its totient is φ = 2040142420.

The previous prime is 2040142397. The next prime is 2040142453. The reversal of 2040142421 is 1242410402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1622961796 + 417180625 = 40286^2 + 20425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040142421 - 2¹⁸ = 2039880277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2040142393 and 2040142402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040142921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020071210 + 1020071211.

It is an arithmetic number, because the mean of its divisors is an integer number (1020071211).

Almost surely, 2^2040142421 is an apocalyptic number.

It is an amenable number.

2040142421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040142421 is an equidigital number, since it uses as much as digits as its factorization.

2040142421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2040142421 is about 45167.9357619982. The cubic root of 2040142421 is about 1268.2946547022.

Adding to 2040142421 its reverse (1242410402), we get a palindrome (3282552823).

The spelling of 2040142421 in words is "two billion, forty million, one hundred forty-two thousand, four hundred twenty-one".