1047213756 has 36 divisors (see below), whose sum is σ = 2648276904. Its totient is φ = 348919200.

The previous prime is 1047213737. The next prime is 1047213757. The reversal of 1047213756 is 6573127401.

It is a happy number.

1047213756 is a `hidden beast` number, since 1 + 0 + 472 + 137 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 1047213756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047213757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103566 + ... + 113226.

Almost surely, 2^1047213756 is an apocalyptic number.

It is an amenable number.

1047213756 is an abundant number, since it is smaller than the sum of its proper divisors (1601063148).

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

1047213756 is a wasteful number, since it uses less digits than its factorization.

1047213756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12682 (or 12677 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1047213756 is about 32360.6822548598. The cubic root of 1047213756 is about 1015.4965355918.

The spelling of 1047213756 in words is "one billion, forty-seven million, two hundred thirteen thousand, seven hundred fifty-six".