261526 has 8 divisors (see below), whose sum is σ = 401544. Its totient is φ = 127680.

The previous prime is 261523. The next prime is 261529. The reversal of 261526 is 625162.

It is an interprime number because it is at equal distance from previous prime (261523) and next prime (261529).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 261497 and 261506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (50193).

2²⁶¹⁵²⁶ is an apocalyptic number.

261526 is a deficient number, since it is larger than the sum of its proper divisors (140018).

261526 is a wasteful number, since it uses less digits than its factorization.

261526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086.

The product of its digits is 720, while the sum is 22.

The square root of 261526 is about 511.3961282607. The cubic root of 261526 is about 63.9496674578.

Adding to 261526 its reverse (625162), we get a palindrome (886688).

It can be divided in two parts, 261 and 526, that added together give a palindrome (787).

The spelling of 261526 in words is "two hundred sixty-one thousand, five hundred twenty-six".