261046406 has 8 divisors (see below), whose sum is σ = 391675080. Its totient is φ = 130488048.

The previous prime is 261046403. The next prime is 261046417. The reversal of 261046406 is 604640162.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261046403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7031 + ... + 23906.

It is an arithmetic number, because the mean of its divisors is an integer number (48959385).

Almost surely, 2^261046406 is an apocalyptic number.

261046406 is a deficient number, since it is larger than the sum of its proper divisors (130628674).

261046406 is a wasteful number, since it uses less digits than its factorization.

261046406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35158.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 261046406 is about 16156.9305872124. The cubic root of 261046406 is about 639.1055261682.

Adding to 261046406 its reverse (604640162), we get a palindrome (865686568).

The spelling of 261046406 in words is "two hundred sixty-one million, forty-six thousand, four hundred six".