261290262 has 8 divisors (see below), whose sum is σ = 522580536. Its totient is φ = 87096752.

The previous prime is 261290257. The next prime is 261290269. The reversal of 261290262 is 262092162.

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

261290262 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261290269) 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, 21774183 + ... + 21774194.

It is an arithmetic number, because the mean of its divisors is an integer number (65322567).

Almost surely, 2^261290262 is an apocalyptic number.

261290262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261290262 is a wasteful number, since it uses less digits than its factorization.

261290262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43548382.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 261290262 is about 16164.4753085276. The cubic root of 261290262 is about 639.3044706341.

The spelling of 261290262 in words is "two hundred sixty-one million, two hundred ninety thousand, two hundred sixty-two".