1260741636 has 144 divisors (see below), whose sum is σ = 4070521728. Its totient is φ = 319449600.

The previous prime is 1260741631. The next prime is 1260741649. The reversal of 1260741636 is 6361470621.

It is a happy number.

1260741636 is a `hidden beast` number, since 1 + 2 + 607 + 4 + 16 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1260741636.

It is not an unprimeable number, because it can be changed into a prime (1260741631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108106 + ... + 119198.

It is an arithmetic number, because the mean of its divisors is an integer number (28267512).

Almost surely, 2^1260741636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1260741636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2035260864).

1260741636 is an abundant number, since it is smaller than the sum of its proper divisors (2809780092).

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

1260741636 is a wasteful number, since it uses less digits than its factorization.

1260741636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11162 (or 11157 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1260741636 is about 35506.9237755117. The cubic root of 1260741636 is about 1080.2941688386.

The spelling of 1260741636 in words is "one billion, two hundred sixty million, seven hundred forty-one thousand, six hundred thirty-six".