261430 has 16 divisors (see below), whose sum is σ = 507024. Its totient is φ = 96480.

The previous prime is 261427. The next prime is 261431. The reversal of 261430 is 34162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261431) 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 7 ways as a sum of consecutive naturals, for example, 876 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (31689).

2²⁶¹⁴³⁰ is an apocalyptic number.

261430 is a deficient number, since it is larger than the sum of its proper divisors (245594).

261430 is a wasteful number, since it uses less digits than its factorization.

261430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031.

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

The square root of 261430 is about 511.3022589428. The cubic root of 261430 is about 63.9418416974.

Adding to 261430 its reverse (34162), we get a palindrome (295592).

The spelling of 261430 in words is "two hundred sixty-one thousand, four hundred thirty".