266425 has 6 divisors (see below), whose sum is σ = 330398. Its totient is φ = 213120.

The previous prime is 266417. The next prime is 266447. The reversal of 266425 is 524662.

It can be written as a sum of positive squares in 3 ways, for example, as 169 + 266256 = 13^2 + 516^2 .

It is not a de Polignac number, because 266425 - 2³ = 266417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 10657 = 266425 / (2 + 6 + 6 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5304 + ... + 5353.

2²⁶⁶⁴²⁵ is an apocalyptic number.

266425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266425 is a deficient number, since it is larger than the sum of its proper divisors (63973).

266425 is a wasteful number, since it uses less digits than its factorization.

266425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10667 (or 10662 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 266425 is about 516.1637337125. The cubic root of 266425 is about 64.3465092136.

It can be divided in two parts, 266 and 425, that multiplied together give a triangular number (113050 = T₄₇₅).

The spelling of 266425 in words is "two hundred sixty-six thousand, four hundred twenty-five".