265616 has 20 divisors (see below), whose sum is σ = 554652. Its totient is φ = 122496.

The previous prime is 265613. The next prime is 265619. The reversal of 265616 is 616562.

It is an interprime number because it is at equal distance from previous prime (265613) and next prime (265619).

It can be written as a sum of positive squares in 2 ways, for example, as 102400 + 163216 = 320^2 + 404^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (265613) 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, 431 + ... + 846.

2²⁶⁵⁶¹⁶ is an apocalyptic number.

265616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

265616 is an abundant number, since it is smaller than the sum of its proper divisors (289036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265616 is a wasteful number, since it uses less digits than its factorization.

265616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1292 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 265616 is about 515.3794718457. The cubic root of 265616 is about 64.2813137493.

The spelling of 265616 in words is "two hundred sixty-five thousand, six hundred sixteen".