261429 has 16 divisors (see below), whose sum is σ = 407040. Its totient is φ = 146160.

The previous prime is 261427. The next prime is 261431. The reversal of 261429 is 924162.

It is an interprime number because it is at equal distance from previous prime (261427) and next prime (261431).

It is not a de Polignac number, because 261429 - 2¹ = 261427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261399 and 261408.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261429.

It is not an unprimeable number, because it can be changed into a prime (261427) 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 15 ways as a sum of consecutive naturals, for example, 1134 + ... + 1344.

It is an arithmetic number, because the mean of its divisors is an integer number (25440).

2²⁶¹⁴²⁹ is an apocalyptic number.

It is an amenable number.

261429 is a deficient number, since it is larger than the sum of its proper divisors (145611).

261429 is a wasteful number, since it uses less digits than its factorization.

261429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its digits is 864, while the sum is 24.

The square root of 261429 is about 511.3012810467. The cubic root of 261429 is about 63.9417601690.

The spelling of 261429 in words is "two hundred sixty-one thousand, four hundred twenty-nine".