402325421 has 2 divisors, whose sum is σ = 402325422. Its totient is φ = 402325420.

The previous prime is 402325393. The next prime is 402325423. The reversal of 402325421 is 124523204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255552196 + 146773225 = 15986^2 + 12115^2 .

It is a cyclic number.

It is not a de Polignac number, because 402325421 - 2²² = 398131117 is a prime.

Together with 402325423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402325423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201162710 + 201162711.

It is an arithmetic number, because the mean of its divisors is an integer number (201162711).

Almost surely, 2^402325421 is an apocalyptic number.

It is an amenable number.

402325421 is a deficient number, since it is larger than the sum of its proper divisors (1).

402325421 is an equidigital number, since it uses as much as digits as its factorization.

402325421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 402325421 is about 20058.0512762332. The cubic root of 402325421 is about 738.2313624284.

Adding to 402325421 its reverse (124523204), we get a palindrome (526848625).

The spelling of 402325421 in words is "four hundred two million, three hundred twenty-five thousand, four hundred twenty-one".