6421712 has 60 divisors (see below), whose sum is σ = 14249088. Its totient is φ = 2798400.

The previous prime is 6421703. The next prime is 6421721. The reversal of 6421712 is 2171246.

It is an interprime number because it is at equal distance from previous prime (6421703) and next prime (6421721).

Its product of digits (672) is a multiple of the sum of its prime factors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59963 + ... + 60069.

Almost surely, 2^6421712 is an apocalyptic number.

6421712 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6421712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7124544).

6421712 is an abundant number, since it is smaller than the sum of its proper divisors (7827376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421712 is a wasteful number, since it uses less digits than its factorization.

6421712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 151 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 6421712 is about 2534.1097055968. The cubic root of 6421712 is about 185.8732709023.

Adding to 6421712 its reverse (2171246), we get a palindrome (8592958).

The spelling of 6421712 in words is "six million, four hundred twenty-one thousand, seven hundred twelve".