2002425421 has 2 divisors, whose sum is σ = 2002425422. Its totient is φ = 2002425420.

The previous prime is 2002425413. The next prime is 2002425431. The reversal of 2002425421 is 1245242002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1847796196 + 154629225 = 42986^2 + 12435^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002425421 - 2³ = 2002425413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2002425392 and 2002425401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002425401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001212710 + 1001212711.

It is an arithmetic number, because the mean of its divisors is an integer number (1001212711).

Almost surely, 2^2002425421 is an apocalyptic number.

It is an amenable number.

2002425421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002425421 is an equidigital number, since it uses as much as digits as its factorization.

2002425421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2002425421 is about 44748.4683648502. The cubic root of 2002425421 is about 1260.4301506485.

Adding to 2002425421 its reverse (1245242002), we get a palindrome (3247667423).

The spelling of 2002425421 in words is "two billion, two million, four hundred twenty-five thousand, four hundred twenty-one".