261065022 has 16 divisors (see below), whose sum is σ = 552843792. Its totient is φ = 81902720.

The previous prime is 261064987. The next prime is 261065023. The reversal of 261065022 is 220560162.

It is a junction number, because it is equal to n+sod(n) for n = 261064983 and 261065001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261065023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279629 + ... + 1279832.

It is an arithmetic number, because the mean of its divisors is an integer number (34552737).

Almost surely, 2^261065022 is an apocalyptic number.

261065022 is an abundant number, since it is smaller than the sum of its proper divisors (291778770).

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

261065022 is a wasteful number, since it uses less digits than its factorization.

261065022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559483.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 261065022 is about 16157.5066764647. The cubic root of 261065022 is about 639.1207179826.

The spelling of 261065022 in words is "two hundred sixty-one million, sixty-five thousand, twenty-two".