261495349 has 16 divisors (see below), whose sum is σ = 286945920. Its totient is φ = 237504960.

The previous prime is 261495319. The next prime is 261495359. The reversal of 261495349 is 943594162.

It is a cyclic number.

It is not a de Polignac number, because 261495349 - 2⁹ = 261494837 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 (261495319) 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, 37474 + ... + 43900.

It is an arithmetic number, because the mean of its divisors is an integer number (17934120).

Almost surely, 2^261495349 is an apocalyptic number.

261495349 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

261495349 is a deficient number, since it is larger than the sum of its proper divisors (25450571).

261495349 is a wasteful number, since it uses less digits than its factorization.

261495349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540.

The product of its digits is 233280, while the sum is 43.

The square root of 261495349 is about 16170.8178210009. The cubic root of 261495349 is about 639.4716904740.

The spelling of 261495349 in words is "two hundred sixty-one million, four hundred ninety-five thousand, three hundred forty-nine".