261035 has 16 divisors (see below), whose sum is σ = 344736. Its totient is φ = 188928.

The previous prime is 261031. The next prime is 261043. The reversal of 261035 is 530162.

261035 is nontrivially palindromic in base 15.

It is a cyclic number.

It is not a de Polignac number, because 261035 - 2² = 261031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

261035 is an undulating number in base 15.

It is not an unprimeable number, because it can be changed into a prime (261031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3104 + ... + 3186.

It is an arithmetic number, because the mean of its divisors is an integer number (21546).

2²⁶¹⁰³⁵ is an apocalyptic number.

261035 is a deficient number, since it is larger than the sum of its proper divisors (83701).

261035 is a wasteful number, since it uses less digits than its factorization.

261035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 261035 is about 510.9158443423. The cubic root of 261035 is about 63.9096217806.

Adding to 261035 its reverse (530162), we get a palindrome (791197).

The spelling of 261035 in words is "two hundred sixty-one thousand, thirty-five".