121157847 has 6 divisors (see below), whose sum is σ = 175005792. Its totient is φ = 80771892.

The previous prime is 121157843. The next prime is 121157891. The reversal of 121157847 is 748751121.

It is not a de Polignac number, because 121157847 - 2² = 121157843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121157843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6730983 + ... + 6731000.

It is an arithmetic number, because the mean of its divisors is an integer number (29167632).

Almost surely, 2^121157847 is an apocalyptic number.

121157847 is a deficient number, since it is larger than the sum of its proper divisors (53847945).

121157847 is a wasteful number, since it uses less digits than its factorization.

121157847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13461989 (or 13461986 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 121157847 is about 11007.1725252219. The cubic root of 121157847 is about 494.8237266444.

The spelling of 121157847 in words is "one hundred twenty-one million, one hundred fifty-seven thousand, eight hundred forty-seven".