4251605 has 8 divisors (see below), whose sum is σ = 5141664. Its totient is φ = 3374800.

The previous prime is 4251601. The next prime is 4251617. The reversal of 4251605 is 5061524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4251605 - 2² = 4251601 is a prime.

It is a super-2 number, since 2×4251605² = 36152290152050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2591 + ... + 3900.

It is an arithmetic number, because the mean of its divisors is an integer number (642708).

Almost surely, 2^4251605 is an apocalyptic number.

It is an amenable number.

4251605 is a deficient number, since it is larger than the sum of its proper divisors (890059).

4251605 is a wasteful number, since it uses less digits than its factorization.

4251605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 4251605 is about 2061.9420457423. The cubic root of 4251605 is about 162.0009779954. Note that the first 3 decimals are identical.

The spelling of 4251605 in words is "four million, two hundred fifty-one thousand, six hundred five".