420770 has 16 divisors (see below), whose sum is σ = 865728. Its totient is φ = 144240.

The previous prime is 420769. The next prime is 420779. The reversal of 420770 is 77024.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936 + ... + 3075.

It is an arithmetic number, because the mean of its divisors is an integer number (54108).

2⁴²⁰⁷⁷⁰ is an apocalyptic number.

420770 is an abundant number, since it is smaller than the sum of its proper divisors (444958).

It is a weird number, because it is abundant, but not a pseudoperfect number.

420770 is a wasteful number, since it uses less digits than its factorization.

420770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 420770 is about 648.6678657063. The cubic root of 420770 is about 74.9344612642.

Adding to 420770 its reverse (77024), we get a palindrome (497794).

The spelling of 420770 in words is "four hundred twenty thousand, seven hundred seventy", and thus it is an iban number.