2265987 has 4 divisors (see below), whose sum is σ = 3021320. Its totient is φ = 1510656.

The previous prime is 2265979. The next prime is 2266003. The reversal of 2265987 is 7895622.

It is a happy number.

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

It is not a de Polignac number, because 2265987 - 2³ = 2265979 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁸ + 2¹⁸ + 6⁸ + 5⁴ + 9⁵ + 8 + 7⁴ .

It is a D-number.

It is a Duffinian number.

2265987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2265287) 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, 377662 + ... + 377667.

It is an arithmetic number, because the mean of its divisors is an integer number (755330).

2^2265987 is an apocalyptic number.

2265987 is a deficient number, since it is larger than the sum of its proper divisors (755333).

2265987 is an equidigital number, since it uses as much as digits as its factorization.

2265987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755332.

The product of its digits is 60480, while the sum is 39.

The square root of 2265987 is about 1505.3195674009. The cubic root of 2265987 is about 131.3466915619.

It can be divided in two parts, 2265 and 987, that multiplied together give a triangular number (2235555 = T₂₁₁₄).

The spelling of 2265987 in words is "two million, two hundred sixty-five thousand, nine hundred eighty-seven".