261023434 has 32 divisors (see below), whose sum is σ = 457228800. Its totient is φ = 109446000.

The previous prime is 261023401. The next prime is 261023437. The reversal of 261023434 is 434320162.

It is a junction number, because it is equal to n+sod(n) for n = 261023399 and 261023408.

It is not an unprimeable number, because it can be changed into a prime (261023437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206697 + ... + 207955.

It is an arithmetic number, because the mean of its divisors is an integer number (14288400).

Almost surely, 2^261023434 is an apocalyptic number.

261023434 is a deficient number, since it is larger than the sum of its proper divisors (196205366).

261023434 is a wasteful number, since it uses less digits than its factorization.

261023434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

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

The square root of 261023434 is about 16156.2196692172. The cubic root of 261023434 is about 639.0867785911.

Adding to 261023434 its reverse (434320162), we get a palindrome (695343596).

The spelling of 261023434 in words is "two hundred sixty-one million, twenty-three thousand, four hundred thirty-four".