421516 has 6 divisors (see below), whose sum is σ = 737660. Its totient is φ = 210756.

The previous prime is 421501. The next prime is 421517. The reversal of 421516 is 615124.

421516 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 421493 and 421502.

It is not an unprimeable number, because it can be changed into a prime (421517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52686 + ... + 52693.

2⁴²¹⁵¹⁶ is an apocalyptic number.

It is an amenable number.

421516 is a deficient number, since it is larger than the sum of its proper divisors (316144).

421516 is a wasteful number, since it uses less digits than its factorization.

421516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105383 (or 105381 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 421516 is about 649.2426356918. The cubic root of 421516 is about 74.9787198886.

The spelling of 421516 in words is "four hundred twenty-one thousand, five hundred sixteen".