4251420 has 48 divisors (see below), whose sum is σ = 13228320. Its totient is φ = 1133568.

The previous prime is 4251419. The next prime is 4251449. The reversal of 4251420 is 241524.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4251393 and 4251402.

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 15 ways as a sum of consecutive naturals, for example, 3397 + ... + 4476.

It is an arithmetic number, because the mean of its divisors is an integer number (275590).

Almost surely, 2^4251420 is an apocalyptic number.

It is an amenable number.

4251420 is an abundant number, since it is smaller than the sum of its proper divisors (8976900).

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

4251420 is a wasteful number, since it uses less digits than its factorization.

4251420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891 (or 7883 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4251420 is about 2061.8971846336. The cubic root of 4251420 is about 161.9986282463.

Adding to 4251420 its reverse (241524), we get a palindrome (4492944).

The spelling of 4251420 in words is "four million, two hundred fifty-one thousand, four hundred twenty".