261012722 has 8 divisors (see below), whose sum is σ = 391692672. Its totient is φ = 130448500.

The previous prime is 261012721. The next prime is 261012727. The reversal of 261012722 is 227210162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (261012721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23054 + ... + 32457.

It is an arithmetic number, because the mean of its divisors is an integer number (48961584).

Almost surely, 2^261012722 is an apocalyptic number.

261012722 is a deficient number, since it is larger than the sum of its proper divisors (130679950).

261012722 is a wasteful number, since it uses less digits than its factorization.

261012722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57864.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 261012722 is about 16155.8881526210. Note that the first 3 decimals coincide. The cubic root of 261012722 is about 639.0780360923.

Adding to 261012722 its reverse (227210162), we get a palindrome (488222884).

The spelling of 261012722 in words is "two hundred sixty-one million, twelve thousand, seven hundred twenty-two".