261602258 has 8 divisors (see below), whose sum is σ = 392497920. Its totient is φ = 130769620.

The previous prime is 261602251. The next prime is 261602261. The reversal of 261602258 is 852206162.

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

It is not an unprimeable number, because it can be changed into a prime (261602251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3458 + ... + 23133.

It is an arithmetic number, because the mean of its divisors is an integer number (49062240).

Almost surely, 2^261602258 is an apocalyptic number.

261602258 is a deficient number, since it is larger than the sum of its proper divisors (130895662).

261602258 is a wasteful number, since it uses less digits than its factorization.

261602258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31512.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 261602258 is about 16174.1230983321. The cubic root of 261602258 is about 639.5588251841.

The spelling of 261602258 in words is "two hundred sixty-one million, six hundred two thousand, two hundred fifty-eight".