1243096857 has 12 divisors (see below), whose sum is σ = 1825020964. Its totient is φ = 815145120.

The previous prime is 1243096853. The next prime is 1243096867. The reversal of 1243096857 is 7586903421.

1243096857 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 109495296 + 1133601561 = 10464^2 + 33669^2 .

It is not a de Polignac number, because 1243096857 - 2² = 1243096853 is a prime.

It is a Duffinian number.

1243096857 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (1243096853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1131598 + ... + 1132695.

It is a 1-persistent number, because it is pandigital, but 2⋅1243096857 = 2486193714 is not.

Almost surely, 2^1243096857 is an apocalyptic number.

It is an amenable number.

1243096857 is a deficient number, since it is larger than the sum of its proper divisors (581924107).

1243096857 is a wasteful number, since it uses less digits than its factorization.

1243096857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264360 (or 2264357 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1243096857 is about 35257.5787172063. The cubic root of 1243096857 is about 1075.2307006581.

The spelling of 1243096857 in words is "one billion, two hundred forty-three million, ninety-six thousand, eight hundred fifty-seven".