1056857243 has 4 divisors (see below), whose sum is σ = 1138153968. Its totient is φ = 975560520.

The previous prime is 1056857209. The next prime is 1056857267. The reversal of 1056857243 is 3427586501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1056857243 - 2¹⁴ = 1056840859 is a prime.

It is a super-2 number, since 2×1056857243² = 2233894464163122098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056857243.

It is not an unprimeable number, because it can be changed into a prime (1056857143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40648343 + ... + 40648368.

It is an arithmetic number, because the mean of its divisors is an integer number (284538492).

Almost surely, 2^1056857243 is an apocalyptic number.

1056857243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1056857243 is a deficient number, since it is larger than the sum of its proper divisors (81296725).

1056857243 is an equidigital number, since it uses as much as digits as its factorization.

1056857243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81296724.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 1056857243 is about 32509.3408576674. The cubic root of 1056857243 is about 1018.6041534196.

The spelling of 1056857243 in words is "one billion, fifty-six million, eight hundred fifty-seven thousand, two hundred forty-three".