421104091 has 2 divisors, whose sum is σ = 421104092. Its totient is φ = 421104090.

The previous prime is 421104043. The next prime is 421104107. The reversal of 421104091 is 190401124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421104091 - 2²³ = 412715483 is a prime.

It is a super-3 number, since 3×421104091³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (421104001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210552045 + 210552046.

It is an arithmetic number, because the mean of its divisors is an integer number (210552046).

Almost surely, 2^421104091 is an apocalyptic number.

421104091 is a deficient number, since it is larger than the sum of its proper divisors (1).

421104091 is an equidigital number, since it uses as much as digits as its factorization.

421104091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 421104091 is about 20520.8209143786. The cubic root of 421104091 is about 749.5428864900.

The spelling of 421104091 in words is "four hundred twenty-one million, one hundred four thousand, ninety-one".