4129720 has 80 divisors (see below), whose sum is σ = 11091960. Its totient is φ = 1382976.

The previous prime is 4129667. The next prime is 4129721. The reversal of 4129720 is 279214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4129721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 96019 + ... + 96061.

Almost surely, 2^4129720 is an apocalyptic number.

4129720 is a gapful number since it is divisible by the number (40) 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 4129720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5545980).

4129720 is an abundant number, since it is smaller than the sum of its proper divisors (6962240).

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

4129720 is an equidigital number, since it uses as much as digits as its factorization.

4129720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 4129720 is about 2032.1712526261. The cubic root of 4129720 is about 160.4378631312.

The spelling of 4129720 in words is "four million, one hundred twenty-nine thousand, seven hundred twenty".