420436 has 12 divisors (see below), whose sum is σ = 744660. Its totient is φ = 207680.

The previous prime is 420421. The next prime is 420439. The reversal of 420436 is 634024.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 176400 = 494^2 + 420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (62055).

2⁴²⁰⁴³⁶ is an apocalyptic number.

It is an amenable number.

420436 is a deficient number, since it is larger than the sum of its proper divisors (324224).

420436 is a wasteful number, since it uses less digits than its factorization.

420436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 420436 is about 648.4103638900. The cubic root of 420436 is about 74.9146287862.

The spelling of 420436 in words is "four hundred twenty thousand, four hundred thirty-six".