261034 has 4 divisors (see below), whose sum is σ = 391554. Its totient is φ = 130516.

The previous prime is 261031. The next prime is 261043. The reversal of 261034 is 430162.

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

It can be written as a sum of positive squares in only one way, i.e., 140625 + 120409 = 375^2 + 347^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 260999 and 261017.

It is not an unprimeable number, because it can be changed into a prime (261031) 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 as a sum of consecutive naturals, namely, 65257 + ... + 65260.

2²⁶¹⁰³⁴ is an apocalyptic number.

261034 is a deficient number, since it is larger than the sum of its proper divisors (130520).

261034 is a wasteful number, since it uses less digits than its factorization.

261034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130519.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 261034 is about 510.9148657066. The cubic root of 261034 is about 63.9095401699.

Adding to 261034 its reverse (430162), we get a palindrome (691196).

The spelling of 261034 in words is "two hundred sixty-one thousand, thirty-four".