261342422 has 32 divisors (see below), whose sum is σ = 453613824. Its totient is φ = 111751200.

The previous prime is 261342421. The next prime is 261342427. The reversal of 261342422 is 224243162.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 261342391 and 261342400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261342421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26633 + ... + 35099.

It is an arithmetic number, because the mean of its divisors is an integer number (14175432).

Almost surely, 2^261342422 is an apocalyptic number.

261342422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261342422 is a deficient number, since it is larger than the sum of its proper divisors (192271402).

261342422 is a wasteful number, since it uses less digits than its factorization.

261342422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564.

The product of its digits is 4608, while the sum is 26.

The square root of 261342422 is about 16166.0886425876. The cubic root of 261342422 is about 639.3470081328.

Adding to 261342422 its reverse (224243162), we get a palindrome (485585584).

The spelling of 261342422 in words is "two hundred sixty-one million, three hundred forty-two thousand, four hundred twenty-two".