1261262442 has 16 divisors (see below), whose sum is σ = 2751845472. Its totient is φ = 382200720.

The previous prime is 1261262399. The next prime is 1261262449. The reversal of 1261262442 is 2442621621.

It is not an unprimeable number, because it can be changed into a prime (1261262449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554953 + ... + 9555084.

It is an arithmetic number, because the mean of its divisors is an integer number (171990342).

Almost surely, 2^1261262442 is an apocalyptic number.

1261262442 is an abundant number, since it is smaller than the sum of its proper divisors (1490583030).

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

1261262442 is a wasteful number, since it uses less digits than its factorization.

1261262442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110053.

The product of its digits is 9216, while the sum is 30.

The square root of 1261262442 is about 35514.2568836798. The cubic root of 1261262442 is about 1080.4429030477.

The spelling of 1261262442 in words is "one billion, two hundred sixty-one million, two hundred sixty-two thousand, four hundred forty-two".