261081246 has 8 divisors (see below), whose sum is σ = 522162504. Its totient is φ = 87027080.

The previous prime is 261081241. The next prime is 261081253. The reversal of 261081246 is 642180162.

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

261081246 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261081241) 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 3 ways as a sum of consecutive naturals, for example, 21756765 + ... + 21756776.

It is an arithmetic number, because the mean of its divisors is an integer number (65270313).

Almost surely, 2^261081246 is an apocalyptic number.

261081246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261081246 is a wasteful number, since it uses less digits than its factorization.

261081246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43513546.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 261081246 is about 16158.0087263252. The cubic root of 261081246 is about 639.1339571872.

The spelling of 261081246 in words is "two hundred sixty-one million, eighty-one thousand, two hundred forty-six".