261042422 has 16 divisors (see below), whose sum is σ = 401429952. Its totient is φ = 127244040.

The previous prime is 261042409. The next prime is 261042451. The reversal of 261042422 is 224240162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47897 + ... + 53067.

It is an arithmetic number, because the mean of its divisors is an integer number (25089372).

Almost surely, 2^261042422 is an apocalyptic number.

261042422 is a deficient number, since it is larger than the sum of its proper divisors (140387530).

261042422 is a wasteful number, since it uses less digits than its factorization.

261042422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 261042422 is about 16156.8072959976. The cubic root of 261042422 is about 639.1022748824.

Adding to 261042422 its reverse (224240162), we get a palindrome (485282584).

The spelling of 261042422 in words is "two hundred sixty-one million, forty-two thousand, four hundred twenty-two".