4251965 has 4 divisors (see below), whose sum is σ = 5102364. Its totient is φ = 3401568.

The previous prime is 4251931. The next prime is 4251967. The reversal of 4251965 is 5691524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1552516 + 2699449 = 1246^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251965 - 2¹⁰ = 4250941 is a prime.

It is a super-2 number, since 2×4251965² = 36158412722450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425192 + ... + 425201.

It is an arithmetic number, because the mean of its divisors is an integer number (1275591).

Almost surely, 2^4251965 is an apocalyptic number.

It is an amenable number.

4251965 is a deficient number, since it is larger than the sum of its proper divisors (850399).

4251965 is an equidigital number, since it uses as much as digits as its factorization.

4251965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850398.

The product of its digits is 10800, while the sum is 32.

The square root of 4251965 is about 2062.0293402374. The cubic root of 4251965 is about 162.0055502849.

The spelling of 4251965 in words is "four million, two hundred fifty-one thousand, nine hundred sixty-five".