421240013 has 8 divisors (see below), whose sum is σ = 444057120. Its totient is φ = 398487600.

The previous prime is 421240007. The next prime is 421240037. The reversal of 421240013 is 310042124.

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 421240013 - 2⁸ = 421239757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421239973 and 421240000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421240073) 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, 2495 + ... + 29132.

It is an arithmetic number, because the mean of its divisors is an integer number (55507140).

Almost surely, 2^421240013 is an apocalyptic number.

It is an amenable number.

421240013 is a deficient number, since it is larger than the sum of its proper divisors (22817107).

421240013 is a wasteful number, since it uses less digits than its factorization.

421240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32347.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 421240013 is about 20524.1324542598. The cubic root of 421240013 is about 749.6235224586.

Adding to 421240013 its reverse (310042124), we get a palindrome (731282137).

The spelling of 421240013 in words is "four hundred twenty-one million, two hundred forty thousand, thirteen".