423401601 has 16 divisors (see below), whose sum is σ = 658352000. Its totient is φ = 241943184.

The previous prime is 423401581. The next prime is 423401603. The reversal of 423401601 is 106104324.

It is not a de Polignac number, because 423401601 - 2¹⁰ = 423400577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423401603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204706 + ... + 206763.

It is an arithmetic number, because the mean of its divisors is an integer number (41147000).

Almost surely, 2^423401601 is an apocalyptic number.

It is an amenable number.

423401601 is a deficient number, since it is larger than the sum of its proper divisors (234950399).

423401601 is an equidigital number, since it uses as much as digits as its factorization.

423401601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411493 (or 411479 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 423401601 is about 20576.7247393748. The cubic root of 423401601 is about 750.9035634381.

Adding to 423401601 its reverse (106104324), we get a palindrome (529505925).

The spelling of 423401601 in words is "four hundred twenty-three million, four hundred one thousand, six hundred one".