261290206 has 8 divisors (see below), whose sum is σ = 398360664. Its totient is φ = 128503320.

The previous prime is 261290201. The next prime is 261290213. The reversal of 261290206 is 602092162.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261290201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070740 + ... + 1070983.

It is an arithmetic number, because the mean of its divisors is an integer number (49795083).

Almost surely, 2^261290206 is an apocalyptic number.

261290206 is a deficient number, since it is larger than the sum of its proper divisors (137070458).

261290206 is a wasteful number, since it uses less digits than its factorization.

261290206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141786.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 261290206 is about 16164.4735763340. The cubic root of 261290206 is about 639.3044249619.

The spelling of 261290206 in words is "two hundred sixty-one million, two hundred ninety thousand, two hundred six".