261234356 has 24 divisors (see below), whose sum is σ = 475480320. Its totient is φ = 125472672.

The previous prime is 261234353. The next prime is 261234397. The reversal of 261234356 is 653432162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261234353) 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, 521 + ... + 22863.

It is an arithmetic number, because the mean of its divisors is an integer number (19811680).

Almost surely, 2^261234356 is an apocalyptic number.

It is an amenable number.

261234356 is a deficient number, since it is larger than the sum of its proper divisors (214245964).

261234356 is a wasteful number, since it uses less digits than its factorization.

261234356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22463 (or 22461 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 261234356 is about 16162.7459300702. The cubic root of 261234356 is about 639.2588719133.

The spelling of 261234356 in words is "two hundred sixty-one million, two hundred thirty-four thousand, three hundred fifty-six".