421401499 has 2 divisors, whose sum is σ = 421401500. Its totient is φ = 421401498.

The previous prime is 421401439. The next prime is 421401509. The reversal of 421401499 is 994104124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421401499 - 2⁷ = 421401371 is a prime.

It is not a weakly prime, because it can be changed into another prime (421401439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210700749 + 210700750.

It is an arithmetic number, because the mean of its divisors is an integer number (210700750).

Almost surely, 2^421401499 is an apocalyptic number.

421401499 is a deficient number, since it is larger than the sum of its proper divisors (1).

421401499 is an equidigital number, since it uses as much as digits as its factorization.

421401499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 421401499 is about 20528.0661290829. The cubic root of 421401499 is about 749.7193017726.

The spelling of 421401499 in words is "four hundred twenty-one million, four hundred one thousand, four hundred ninety-nine".