261430122 has 8 divisors (see below), whose sum is σ = 522860256. Its totient is φ = 87143372.

The previous prime is 261430073. The next prime is 261430151. The reversal of 261430122 is 221034162.

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

261430122 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21785838 + ... + 21785849.

It is an arithmetic number, because the mean of its divisors is an integer number (65357532).

Almost surely, 2^261430122 is an apocalyptic number.

261430122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261430122 is a wasteful number, since it uses less digits than its factorization.

261430122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43571692.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 261430122 is about 16168.8008831824. The cubic root of 261430122 is about 639.4185164390.

Adding to 261430122 its reverse (221034162), we get a palindrome (482464284).

The spelling of 261430122 in words is "two hundred sixty-one million, four hundred thirty thousand, one hundred twenty-two".