261490695 has 8 divisors (see below), whose sum is σ = 418385136. Its totient is φ = 139461696.

The previous prime is 261490687. The next prime is 261490699. The reversal of 261490695 is 596094162.

It is a happy number.

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

It is not a de Polignac number, because 261490695 - 2³ = 261490687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261490699) 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, 8716342 + ... + 8716371.

It is an arithmetic number, because the mean of its divisors is an integer number (52298142).

Almost surely, 2^261490695 is an apocalyptic number.

261490695 is a deficient number, since it is larger than the sum of its proper divisors (156894441).

261490695 is a wasteful number, since it uses less digits than its factorization.

261490695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17432721.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 261490695 is about 16170.6739191661. The cubic root of 261490695 is about 639.4678967559.

The spelling of 261490695 in words is "two hundred sixty-one million, four hundred ninety thousand, six hundred ninety-five".