421388771 has 2 divisors, whose sum is σ = 421388772. Its totient is φ = 421388770.

The previous prime is 421388761. The next prime is 421388789. The reversal of 421388771 is 177883124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421388771 - 2²⁶ = 354279907 is a prime.

It is not a weakly prime, because it can be changed into another prime (421388701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210694385 + 210694386.

It is an arithmetic number, because the mean of its divisors is an integer number (210694386).

Almost surely, 2^421388771 is an apocalyptic number.

421388771 is a deficient number, since it is larger than the sum of its proper divisors (1).

421388771 is an equidigital number, since it uses as much as digits as its factorization.

421388771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 41.

The square root of 421388771 is about 20527.7561121522. The cubic root of 421388771 is about 749.7117535291.

The spelling of 421388771 in words is "four hundred twenty-one million, three hundred eighty-eight thousand, seven hundred seventy-one".