1056861036 has 144 divisors (see below), whose sum is σ = 3445827840. Its totient is φ = 265023360.

The previous prime is 1056861031. The next prime is 1056861097. The reversal of 1056861036 is 6301686501.

It is a happy number.

1056861036 is a `hidden beast` number, since 1 + 0 + 5 + 6 + 8 + 610 + 36 = 666.

It is a super-2 number, since 2×1056861036² = 2233910498829986592, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1056861031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73815 + ... + 86961.

It is an arithmetic number, because the mean of its divisors is an integer number (23929360).

Almost surely, 2^1056861036 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 1056861036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722913920).

1056861036 is an abundant number, since it is smaller than the sum of its proper divisors (2388966804).

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

1056861036 is a wasteful number, since it uses less digits than its factorization.

1056861036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13204 (or 13199 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1056861036 is about 32509.3991946944. The cubic root of 1056861036 is about 1018.6053719888.

The spelling of 1056861036 in words is "one billion, fifty-six million, eight hundred sixty-one thousand, thirty-six".