261253337 has 16 divisors (see below), whose sum is σ = 283464192. Its totient is φ = 240226560.

The previous prime is 261253327. The next prime is 261253361. The reversal of 261253337 is 733352162.

It is a cyclic number.

It is not a de Polignac number, because 261253337 - 2⁶ = 261253273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261253327) 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, 46673 + ... + 51969.

It is an arithmetic number, because the mean of its divisors is an integer number (17716512).

Almost surely, 2^261253337 is an apocalyptic number.

It is an amenable number.

261253337 is a deficient number, since it is larger than the sum of its proper divisors (22210855).

261253337 is a wasteful number, since it uses less digits than its factorization.

261253337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5408.

The product of its digits is 22680, while the sum is 32.

The square root of 261253337 is about 16163.3331030453. Note that the first 3 decimals coincide. The cubic root of 261253337 is about 639.2743541530.

The spelling of 261253337 in words is "two hundred sixty-one million, two hundred fifty-three thousand, three hundred thirty-seven".