261432430 has 16 divisors (see below), whose sum is σ = 537804000. Its totient is φ = 89633952.

The previous prime is 261432407. The next prime is 261432433. The reversal of 261432430 is 34234162.

It is a junction number, because it is equal to n+sod(n) for n = 261432395 and 261432404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261432433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867305 + ... + 1867444.

It is an arithmetic number, because the mean of its divisors is an integer number (33612750).

Almost surely, 2^261432430 is an apocalyptic number.

261432430 is an abundant number, since it is smaller than the sum of its proper divisors (276371570).

261432430 is a wasteful number, since it uses less digits than its factorization.

261432430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734763.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 261432430 is about 16168.8722550461. The cubic root of 261432430 is about 639.4203981063.

Adding to 261432430 its reverse (34234162), we get a palindrome (295666592).

The spelling of 261432430 in words is "two hundred sixty-one million, four hundred thirty-two thousand, four hundred thirty".