1261135076210 has 16 divisors (see below), whose sum is σ = 2270066242392. Its totient is φ = 504448896000.

The previous prime is 1261135076191. The next prime is 1261135076219. The reversal of 1261135076210 is 126705311621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 744701687521 + 516433388689 = 862961^2 + 718633^2 .

It is not an unprimeable number, because it can be changed into a prime (1261135076219) by changing a digit.

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, 483800 + ... + 1660220.

Almost surely, 2^{1261135076210} is an apocalyptic number.

1261135076210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261135076210 is a deficient number, since it is larger than the sum of its proper divisors (1008931166182).

1261135076210 is a wasteful number, since it uses less digits than its factorization.

1261135076210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283629.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 1261135076210 in words is "one trillion, two hundred sixty-one billion, one hundred thirty-five million, seventy-six thousand, two hundred ten".