421242013 has 8 divisors (see below), whose sum is σ = 425829600. Its totient is φ = 416662800.

The previous prime is 421241999. The next prime is 421242037. The reversal of 421242013 is 310242124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421242013 - 2²¹ = 419144861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421242053) 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, 199638 + ... + 201736.

It is an arithmetic number, because the mean of its divisors is an integer number (53228700).

Almost surely, 2^421242013 is an apocalyptic number.

It is an amenable number.

421242013 is a deficient number, since it is larger than the sum of its proper divisors (4587587).

421242013 is a wasteful number, since it uses less digits than its factorization.

421242013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421242013 is about 20524.1811773332. The cubic root of 421242013 is about 749.6247088326.

Adding to 421242013 its reverse (310242124), we get a palindrome (731484137).

It can be divided in two parts, 4212 and 42013, that added together give a square (46225 = 215²).

The spelling of 421242013 in words is "four hundred twenty-one million, two hundred forty-two thousand, thirteen".