421402489 has 2 divisors, whose sum is σ = 421402490. Its totient is φ = 421402488.

The previous prime is 421402459. The next prime is 421402519. The reversal of 421402489 is 984204124.

It is a balanced prime because it is at equal distance from previous prime (421402459) and next prime (421402519).

It can be written as a sum of positive squares in only one way, i.e., 358723600 + 62678889 = 18940^2 + 7917^2 .

It is a cyclic number.

It is not a de Polignac number, because 421402489 - 2¹³ = 421394297 is a prime.

It is not a weakly prime, because it can be changed into another prime (421402439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210701244 + 210701245.

It is an arithmetic number, because the mean of its divisors is an integer number (210701245).

Almost surely, 2^421402489 is an apocalyptic number.

It is an amenable number.

421402489 is a deficient number, since it is larger than the sum of its proper divisors (1).

421402489 is an equidigital number, since it uses as much as digits as its factorization.

421402489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 421402489 is about 20528.0902423971. The cubic root of 421402489 is about 749.7198888782.

The spelling of 421402489 in words is "four hundred twenty-one million, four hundred two thousand, four hundred eighty-nine".