420070 has 32 divisors (see below), whose sum is σ = 917568. Its totient is φ = 135168.

The previous prime is 420047. The next prime is 420073. The reversal of 420070 is 70024.

It is a self number, because there is not a number n which added to its sum of digits gives 420070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420073) by changing a digit.

420070 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, 1014 + ... + 1366.

It is an arithmetic number, because the mean of its divisors is an integer number (28674).

2⁴²⁰⁰⁷⁰ is an apocalyptic number.

420070 is an abundant number, since it is smaller than the sum of its proper divisors (497498).

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

420070 is a wasteful number, since it uses less digits than its factorization.

420070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 420070 is about 648.1280737632. The cubic root of 420070 is about 74.8928841257.

Adding to 420070 its reverse (70024), we get a palindrome (490094).

The spelling of 420070 in words is "four hundred twenty thousand, seventy", and thus it is an iban number.