421312013 has 8 divisors (see below), whose sum is σ = 428034432. Its totient is φ = 414602496.

The previous prime is 421312009. The next prime is 421312019. The reversal of 421312013 is 310213124.

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 421312013 - 2² = 421312009 is a prime.

It is a super-2 number, since 2×421312013² = 355007624596224338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421311982 and 421312000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421312019) 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, 78956 + ... + 84122.

It is an arithmetic number, because the mean of its divisors is an integer number (53504304).

Almost surely, 2^421312013 is an apocalyptic number.

It is an amenable number.

421312013 is a deficient number, since it is larger than the sum of its proper divisors (6722419).

421312013 is a wasteful number, since it uses less digits than its factorization.

421312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 421312013 is about 20525.8864120408. The cubic root of 421312013 is about 749.6662295592. Note that the first 3 decimals are identical.

Adding to 421312013 its reverse (310213124), we get a palindrome (731525137).

It can be divided in two parts, 42131 and 2013, that added together give a palindrome (44144).

The spelling of 421312013 in words is "four hundred twenty-one million, three hundred twelve thousand, thirteen".