261206526 has 16 divisors (see below), whose sum is σ = 597043584. Its totient is φ = 74630424.

The previous prime is 261206497. The next prime is 261206549. The reversal of 261206526 is 625602162.

It is a junction number, because it is equal to n+sod(n) for n = 261206493 and 261206502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3109560 + ... + 3109643.

It is an arithmetic number, because the mean of its divisors is an integer number (37315224).

Almost surely, 2^261206526 is an apocalyptic number.

261206526 is an abundant number, since it is smaller than the sum of its proper divisors (335837058).

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

261206526 is a wasteful number, since it uses less digits than its factorization.

261206526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219215.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 261206526 is about 16161.8849766975. The cubic root of 261206526 is about 639.2361704503.

Adding to 261206526 its reverse (625602162), we get a palindrome (886808688).

The spelling of 261206526 in words is "two hundred sixty-one million, two hundred six thousand, five hundred twenty-six".