261563034 has 32 divisors (see below), whose sum is σ = 528768000. Its totient is φ = 86253104.

The previous prime is 261563009. The next prime is 261563069. The reversal of 261563034 is 430365162.

It is a junction number, because it is equal to n+sod(n) for n = 261562992 and 261563010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256177 + ... + 257195.

It is an arithmetic number, because the mean of its divisors is an integer number (16524000).

Almost surely, 2^261563034 is an apocalyptic number.

261563034 is an abundant number, since it is smaller than the sum of its proper divisors (267204966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261563034 is a wasteful number, since it uses less digits than its factorization.

261563034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 261563034 is about 16172.9104987321. The cubic root of 261563034 is about 639.5268589600.

The spelling of 261563034 in words is "two hundred sixty-one million, five hundred sixty-three thousand, thirty-four".