1261052012 has 24 divisors (see below), whose sum is σ = 2413780992. Its totient is φ = 571701200.

The previous prime is 1261052011. The next prime is 1261052053. The reversal of 1261052012 is 2102501621.

It is not an unprimeable number, because it can be changed into a prime (1261052011) 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, 20564 + ... + 54267.

It is an arithmetic number, because the mean of its divisors is an integer number (100574208).

Almost surely, 2^1261052012 is an apocalyptic number.

It is an amenable number.

1261052012 is a deficient number, since it is larger than the sum of its proper divisors (1152728980).

1261052012 is a wasteful number, since it uses less digits than its factorization.

1261052012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75229 (or 75227 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1261052012 is about 35511.2941470738. The cubic root of 1261052012 is about 1080.3828123963.

Adding to 1261052012 its reverse (2102501621), we get a palindrome (3363553633).

The spelling of 1261052012 in words is "one billion, two hundred sixty-one million, fifty-two thousand, twelve".