261226730 has 32 divisors (see below), whose sum is σ = 477586368. Its totient is φ = 102860800.

The previous prime is 261226727. The next prime is 261226741. The reversal of 261226730 is 37622162.

It is a junction number, because it is equal to n+sod(n) for n = 261226693 and 261226702.

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, 407210 + ... + 407850.

It is an arithmetic number, because the mean of its divisors is an integer number (14924574).

Almost surely, 2^261226730 is an apocalyptic number.

261226730 is a deficient number, since it is larger than the sum of its proper divisors (216359638).

261226730 is a wasteful number, since it uses less digits than its factorization.

261226730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 261226730 is about 16162.5100154648. The cubic root of 261226730 is about 639.2526513997.

Adding to 261226730 its reverse (37622162), we get a palindrome (298848892).

The spelling of 261226730 in words is "two hundred sixty-one million, two hundred twenty-six thousand, seven hundred thirty".