421020097 has 2 divisors, whose sum is σ = 421020098. Its totient is φ = 421020096.

The previous prime is 421020091. The next prime is 421020143. The reversal of 421020097 is 790020124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290054961 + 130965136 = 17031^2 + 11444^2 .

It is a cyclic number.

It is not a de Polignac number, because 421020097 - 2¹⁹ = 420495809 is a prime.

It is not a weakly prime, because it can be changed into another prime (421020091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210510048 + 210510049.

It is an arithmetic number, because the mean of its divisors is an integer number (210510049).

Almost surely, 2^421020097 is an apocalyptic number.

It is an amenable number.

421020097 is a deficient number, since it is larger than the sum of its proper divisors (1).

421020097 is an equidigital number, since it uses as much as digits as its factorization.

421020097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 421020097 is about 20518.7742567630. The cubic root of 421020097 is about 749.4930482252.

The spelling of 421020097 in words is "four hundred twenty-one million, twenty thousand, ninety-seven".