423570 has 32 divisors (see below), whose sum is σ = 1162368. Its totient is φ = 96768.

The previous prime is 423559. The next prime is 423581. The reversal of 423570 is 75324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (423559) and next prime (423581).

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

It is an Ulam number.

It is a zygodrome in base 13.

It is an unprimeable number.

423570 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (36324).

2⁴²³⁵⁷⁰ is an apocalyptic number.

423570 is an abundant number, since it is smaller than the sum of its proper divisors (738798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423570 is a wasteful number, since it uses less digits than its factorization.

423570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 423570 is about 650.8225564622. The cubic root of 423570 is about 75.1003102228.

Adding to 423570 its reverse (75324), we get a palindrome (498894).

The spelling of 423570 in words is "four hundred twenty-three thousand, five hundred seventy".