4257620 has 12 divisors (see below), whose sum is σ = 8941044. Its totient is φ = 1703040.

The previous prime is 4257613. The next prime is 4257641. The reversal of 4257620 is 267524.

It can be written as a sum of positive squares in 2 ways, for example, as 1684804 + 2572816 = 1298^2 + 1604^2 .

It is a d-powerful number, because it can be written as 4 + 2¹⁰ + 5⁶ + 7 + 6⁶ + 2²² + 0 .

It is a self number, because there is not a number n which added to its sum of digits gives 4257620.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106421 + ... + 106460.

It is an arithmetic number, because the mean of its divisors is an integer number (745087).

Almost surely, 2^4257620 is an apocalyptic number.

It is an amenable number.

4257620 is an abundant number, since it is smaller than the sum of its proper divisors (4683424).

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

4257620 is a wasteful number, since it uses less digits than its factorization.

4257620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212890 (or 212888 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 4257620 is about 2063.4001066201. The cubic root of 4257620 is about 162.0773394881.

The spelling of 4257620 in words is "four million, two hundred fifty-seven thousand, six hundred twenty".