261081346 has 8 divisors (see below), whose sum is σ = 391691520. Its totient is φ = 130517508.

The previous prime is 261081341. The next prime is 261081347. The reversal of 261081346 is 643180162.

It is a happy number.

261081346 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 (261081341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12615 + ... + 26101.

It is an arithmetic number, because the mean of its divisors is an integer number (48961440).

Almost surely, 2^261081346 is an apocalyptic number.

261081346 is a deficient number, since it is larger than the sum of its proper divisors (130610174).

261081346 is a wasteful number, since it uses less digits than its factorization.

261081346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23168.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 261081346 is about 16158.0118207656. The cubic root of 261081346 is about 639.1340387881.

The spelling of 261081346 in words is "two hundred sixty-one million, eighty-one thousand, three hundred forty-six".