561429 has 24 divisors (see below), whose sum is σ = 909792. Its totient is φ = 330720.

The previous prime is 561419. The next prime is 561439. The reversal of 561429 is 924165.

It is an interprime number because it is at equal distance from previous prime (561419) and next prime (561439).

It is not a de Polignac number, because 561429 - 2⁸ = 561173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5194 + ... + 5300.

It is an arithmetic number, because the mean of its divisors is an integer number (37908).

2⁵⁶¹⁴²⁹ is an apocalyptic number.

It is an amenable number.

561429 is a deficient number, since it is larger than the sum of its proper divisors (348363).

561429 is a wasteful number, since it uses less digits than its factorization.

561429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 174 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 561429 is about 749.2856598121. The cubic root of 561429 is about 82.4957573576.

It can be divided in two parts, 561 and 429, that added together give a triangular number (990 = T₄₄).

The spelling of 561429 in words is "five hundred sixty-one thousand, four hundred twenty-nine".