1261066684 has 24 divisors (see below), whose sum is σ = 2264679648. Its totient is φ = 614069760.

The previous prime is 1261066669. The next prime is 1261066687. The reversal of 1261066684 is 4866601621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261066687) 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, 90769 + ... + 103735.

It is an arithmetic number, because the mean of its divisors is an integer number (94361652).

Almost surely, 2^1261066684 is an apocalyptic number.

It is an amenable number.

1261066684 is a deficient number, since it is larger than the sum of its proper divisors (1003612964).

1261066684 is a wasteful number, since it uses less digits than its factorization.

1261066684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605 (or 13603 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1261066684 is about 35511.5007286372. The cubic root of 1261066684 is about 1080.3870023676.

The spelling of 1261066684 in words is "one billion, two hundred sixty-one million, sixty-six thousand, six hundred eighty-four".