261495130 has 64 divisors (see below), whose sum is σ = 527337216. Its totient is φ = 92736000.

The previous prime is 261495127. The next prime is 261495131. The reversal of 261495130 is 31594162.

It is a junction number, because it is equal to n+sod(n) for n = 261495092 and 261495101.

It is not an unprimeable number, because it can be changed into a prime (261495131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378085 + ... + 378775.

It is an arithmetic number, because the mean of its divisors is an integer number (8239644).

Almost surely, 2^261495130 is an apocalyptic number.

261495130 is an abundant number, since it is smaller than the sum of its proper divisors (265842086).

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

261495130 is a wasteful number, since it uses less digits than its factorization.

261495130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 261495130 is about 16170.8110495423. The cubic root of 261495130 is about 639.4715119567.

The spelling of 261495130 in words is "two hundred sixty-one million, four hundred ninety-five thousand, one hundred thirty".