421320 has 32 divisors (see below), whose sum is σ = 1264320. Its totient is φ = 112320.

The previous prime is 421313. The next prime is 421331. The reversal of 421320 is 23124.

421320 = T₆₀ + T₆₁ + ... + T₁₃₉.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 421296 and 421305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1636 + ... + 1875.

It is an arithmetic number, because the mean of its divisors is an integer number (39510).

2⁴²¹³²⁰ is an apocalyptic number.

421320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421320 is an abundant number, since it is smaller than the sum of its proper divisors (843000).

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

421320 is a wasteful number, since it uses less digits than its factorization.

421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 421320 is about 649.0916730324. The cubic root of 421320 is about 74.9670966782.

Adding to 421320 its reverse (23124), we get a palindrome (444444).

It can be divided in two parts, 421 and 320, that added together give a triangular number (741 = T₃₈).

The spelling of 421320 in words is "four hundred twenty-one thousand, three hundred twenty", and thus it is an iban number.