2251465 has 4 divisors (see below), whose sum is σ = 2701764. Its totient is φ = 1801168.

The previous prime is 2251451. The next prime is 2251471. The reversal of 2251465 is 5641522.

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 1245456 + 1006009 = 1116^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251465 - 2²¹ = 154313 is a prime.

It is a Duffinian number.

2251465 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225142 + ... + 225151.

It is an arithmetic number, because the mean of its divisors is an integer number (675441).

2^2251465 is an apocalyptic number.

It is an amenable number.

2251465 is a deficient number, since it is larger than the sum of its proper divisors (450299).

2251465 is an equidigital number, since it uses as much as digits as its factorization.

2251465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450298.

The product of its digits is 2400, while the sum is 25.

The square root of 2251465 is about 1500.4882538694. The cubic root of 2251465 is about 131.0655034375.

Adding to 2251465 its reverse (5641522), we get a palindrome (7892987).

The spelling of 2251465 in words is "two million, two hundred fifty-one thousand, four hundred sixty-five".