261241697 has 8 divisors (see below), whose sum is σ = 276176160. Its totient is φ = 246425760.

The previous prime is 261241693. The next prime is 261241733. The reversal of 261241697 is 796142162.

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

It is a cyclic number.

It is not a de Polignac number, because 261241697 - 2² = 261241693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261241697.

It is not an unprimeable number, because it can be changed into a prime (261241691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25079 + ... + 33932.

It is an arithmetic number, because the mean of its divisors is an integer number (34522020).

Almost surely, 2^261241697 is an apocalyptic number.

It is an amenable number.

261241697 is a deficient number, since it is larger than the sum of its proper divisors (14934463).

261241697 is a wasteful number, since it uses less digits than its factorization.

261241697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59263.

The product of its digits is 36288, while the sum is 38.

The square root of 261241697 is about 16162.9730247872. The cubic root of 261241697 is about 639.2648598386.

It can be divided in two parts, 2612416 and 97, that multiplied together give a palindrome (253404352).

The spelling of 261241697 in words is "two hundred sixty-one million, two hundred forty-one thousand, six hundred ninety-seven".