421015 has 16 divisors (see below), whose sum is σ = 603648. Its totient is φ = 275616.

The previous prime is 421009. The next prime is 421019. The reversal of 421015 is 510124.

It is a cyclic number.

It is not a de Polignac number, because 421015 - 2⁹ = 420503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420986 and 421004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544 + ... + 1066.

It is an arithmetic number, because the mean of its divisors is an integer number (37728).

2⁴²¹⁰¹⁵ is an apocalyptic number.

421015 is a deficient number, since it is larger than the sum of its proper divisors (182633).

421015 is a wasteful number, since it uses less digits than its factorization.

421015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 421015 is about 648.8566867961. The cubic root of 421015 is about 74.9490023681.

Adding to 421015 its reverse (510124), we get a palindrome (931139).

It can be divided in two parts, 4210 and 15, that added together give a square (4225 = 65²).

The spelling of 421015 in words is "four hundred twenty-one thousand, fifteen".