1261057422 has 16 divisors (see below), whose sum is σ = 2541975552. Its totient is φ = 417042360.

The previous prime is 1261057403. The next prime is 1261057481. The reversal of 1261057422 is 2247501621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261057422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826704 + ... + 828227.

It is an arithmetic number, because the mean of its divisors is an integer number (158873472).

Almost surely, 2^1261057422 is an apocalyptic number.

1261057422 is an abundant number, since it is smaller than the sum of its proper divisors (1280918130).

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

1261057422 is a wasteful number, since it uses less digits than its factorization.

1261057422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655063.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1261057422 is about 35511.3703199412. The cubic root of 1261057422 is about 1080.3843573663.

The spelling of 1261057422 in words is "one billion, two hundred sixty-one million, fifty-seven thousand, four hundred twenty-two".