1152730857 has 4 divisors (see below), whose sum is σ = 1536974480. Its totient is φ = 768487236.

The previous prime is 1152730853. The next prime is 1152730861. The reversal of 1152730857 is 7580372511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7580372511 = 3 ⋅2526790837.

It is an interprime number because it is at equal distance from previous prime (1152730853) and next prime (1152730861).

It is not a de Polignac number, because 1152730857 - 2² = 1152730853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152730853) 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, 192121807 + ... + 192121812.

It is an arithmetic number, because the mean of its divisors is an integer number (384243620).

Almost surely, 2^1152730857 is an apocalyptic number.

It is an amenable number.

1152730857 is a deficient number, since it is larger than the sum of its proper divisors (384243623).

1152730857 is an equidigital number, since it uses as much as digits as its factorization.

1152730857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384243622.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 1152730857 is about 33951.8903302894. The cubic root of 1152730857 is about 1048.5181991511.

The spelling of 1152730857 in words is "one billion, one hundred fifty-two million, seven hundred thirty thousand, eight hundred fifty-seven".