261367530 has 32 divisors (see below), whose sum is σ = 629201088. Its totient is φ = 69484800.

The previous prime is 261367511. The next prime is 261367577. The reversal of 261367530 is 35763162.

It is a junction number, because it is equal to n+sod(n) for n = 261367491 and 261367500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3231 + ... + 23090.

It is an arithmetic number, because the mean of its divisors is an integer number (19662534).

Almost surely, 2^261367530 is an apocalyptic number.

261367530 is an abundant number, since it is smaller than the sum of its proper divisors (367833558).

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

261367530 is a wasteful number, since it uses less digits than its factorization.

261367530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26662.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 261367530 is about 16166.8651877846. The cubic root of 261367530 is about 639.3674821792.

The spelling of 261367530 in words is "two hundred sixty-one million, three hundred sixty-seven thousand, five hundred thirty".