261461641 has 16 divisors (see below), whose sum is σ = 316825600. Its totient is φ = 210772368.

The previous prime is 261461621. The next prime is 261461653. The reversal of 261461641 is 146164162.

It is a cyclic number.

It is not a de Polignac number, because 261461641 - 2⁵ = 261461609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261461621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11416 + ... + 25558.

It is an arithmetic number, because the mean of its divisors is an integer number (19801600).

Almost surely, 2^261461641 is an apocalyptic number.

It is an amenable number.

261461641 is a deficient number, since it is larger than the sum of its proper divisors (55363959).

261461641 is a wasteful number, since it uses less digits than its factorization.

261461641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14308.

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

The square root of 261461641 is about 16169.7755395676. The cubic root of 261461641 is about 639.4442123077. Note that the first 3 decimals are identical.

The spelling of 261461641 in words is "two hundred sixty-one million, four hundred sixty-one thousand, six hundred forty-one".