261465797 has 8 divisors (see below), whose sum is σ = 277212096. Its totient is φ = 245760192.

The previous prime is 261465781. The next prime is 261465829. The reversal of 261465797 is 797564162.

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 261465797 - 2⁴ = 261465781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261465697) 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, 3608 + ... + 23150.

It is an arithmetic number, because the mean of its divisors is an integer number (34651512).

Almost surely, 2^261465797 is an apocalyptic number.

It is an amenable number.

261465797 is a deficient number, since it is larger than the sum of its proper divisors (15746299).

261465797 is a wasteful number, since it uses less digits than its factorization.

261465797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20347.

The product of its digits is 635040, while the sum is 47.

The square root of 261465797 is about 16169.9040504265. The cubic root of 261465797 is about 639.4476003332.

It can be divided in two parts, 261465 and 797, that added together give a palindrome (262262).

The spelling of 261465797 in words is "two hundred sixty-one million, four hundred sixty-five thousand, seven hundred ninety-seven".