261234355 has 8 divisors (see below), whose sum is σ = 313726464. Its totient is φ = 208824000.

The previous prime is 261234353. The next prime is 261234397. The reversal of 261234355 is 553432162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261234355 - 2¹ = 261234353 is a prime.

It is a Duffinian 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, 13171 + ... + 26380.

It is an arithmetic number, because the mean of its divisors is an integer number (39215808).

Almost surely, 2^261234355 is an apocalyptic number.

261234355 is a deficient number, since it is larger than the sum of its proper divisors (52492109).

261234355 is a wasteful number, since it uses less digits than its factorization.

261234355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40877.

The product of its digits is 21600, while the sum is 31.

The square root of 261234355 is about 16162.7458991348. The cubic root of 261234355 is about 639.2588710976.

The spelling of 261234355 in words is "two hundred sixty-one million, two hundred thirty-four thousand, three hundred fifty-five".