2258765 has 4 divisors (see below), whose sum is σ = 2710524. Its totient is φ = 1807008.

The previous prime is 2258743. The next prime is 2258779. The reversal of 2258765 is 5678522.

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 1771561 + 487204 = 1331^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 2258765 - 2¹⁴ = 2242381 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 2¹³ + 5⁴ + 8² + 7⁵ + 6⁷ + 5⁹ .

It is a Duffinian number.

It is a congruent 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, 225872 + ... + 225881.

It is an arithmetic number, because the mean of its divisors is an integer number (677631).

2^2258765 is an apocalyptic number.

It is an amenable number.

2258765 is a deficient number, since it is larger than the sum of its proper divisors (451759).

2258765 is an equidigital number, since it uses as much as digits as its factorization.

2258765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451758.

The product of its digits is 33600, while the sum is 35.

The square root of 2258765 is about 1502.9188268167. The cubic root of 2258765 is about 131.2070033008.

The spelling of 2258765 in words is "two million, two hundred fifty-eight thousand, seven hundred sixty-five".