1212096857 has 4 divisors (see below), whose sum is σ = 1240285200. Its totient is φ = 1183908516.

The previous prime is 1212096841. The next prime is 1212096881. The reversal of 1212096857 is 7586902121.

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.

It is a cyclic number.

It is not a de Polignac number, because 1212096857 - 2⁴ = 1212096841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212096257) 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, 14094107 + ... + 14094192.

It is an arithmetic number, because the mean of its divisors is an integer number (310071300).

Almost surely, 2^1212096857 is an apocalyptic number.

It is an amenable number.

1212096857 is a deficient number, since it is larger than the sum of its proper divisors (28188343).

1212096857 is an equidigital number, since it uses as much as digits as its factorization.

1212096857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28188342.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1212096857 is about 34815.1814155836. The cubic root of 1212096857 is about 1066.2174230058.

Adding to 1212096857 its reverse (7586902121), we get a palindrome (8798998978).

The spelling of 1212096857 in words is "one billion, two hundred twelve million, ninety-six thousand, eight hundred fifty-seven".