421020789 has 12 divisors (see below), whose sum is σ = 653012064. Its totient is φ = 240583224.

The previous prime is 421020781. The next prime is 421020797. The reversal of 421020789 is 987020124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421020781) and next prime (421020797).

It is not a de Polignac number, because 421020789 - 2³ = 421020781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421020781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1431897 + ... + 1432190.

It is an arithmetic number, because the mean of its divisors is an integer number (54417672).

Almost surely, 2^421020789 is an apocalyptic number.

421020789 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

421020789 is a deficient number, since it is larger than the sum of its proper divisors (231991275).

421020789 is a wasteful number, since it uses less digits than its factorization.

421020789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864104 (or 2864097 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 421020789 is about 20518.7911193618. The cubic root of 421020789 is about 749.4934588540.

The spelling of 421020789 in words is "four hundred twenty-one million, twenty thousand, seven hundred eighty-nine".