421420 has 24 divisors (see below), whose sum is σ = 932400. Its totient is φ = 159552.

The previous prime is 421417. The next prime is 421423. The reversal of 421420 is 24124.

421420 = T₆₅ + T₆₆ + ... + T₁₄₀.

It is an interprime number because it is at equal distance from previous prime (421417) and next prime (421423).

It is a self number, because there is not a number n which added to its sum of digits gives 421420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421423) 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, 175 + ... + 934.

It is an arithmetic number, because the mean of its divisors is an integer number (38850).

2⁴²¹⁴²⁰ is an apocalyptic number.

It is an amenable number.

421420 is an abundant number, since it is smaller than the sum of its proper divisors (510980).

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

421420 is a wasteful number, since it uses less digits than its factorization.

421420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 421420 is about 649.1686991838. The cubic root of 421420 is about 74.9730273379.

Adding to 421420 its reverse (24124), we get a palindrome (445544).

It can be divided in two parts, 421 and 420, that added together give a square (841 = 29²).

The spelling of 421420 in words is "four hundred twenty-one thousand, four hundred twenty", and thus it is an iban number.