121471557 has 16 divisors (see below), whose sum is σ = 166953600. Its totient is φ = 78523200.

The previous prime is 121471531. The next prime is 121471573. The reversal of 121471557 is 755174121.

It is not a de Polignac number, because 121471557 - 2²⁴ = 104694341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121471507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8319 + ... + 17667.

It is an arithmetic number, because the mean of its divisors is an integer number (10434600).

Almost surely, 2^121471557 is an apocalyptic number.

It is an amenable number.

121471557 is a deficient number, since it is larger than the sum of its proper divisors (45482043).

121471557 is an equidigital number, since it uses as much as digits as its factorization.

121471557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484.

The product of its digits is 9800, while the sum is 33.

The square root of 121471557 is about 11021.4135663262. The cubic root of 121471557 is about 495.2504354633.

It can be divided in two parts, 1214 and 71557, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 121471557 in words is "one hundred twenty-one million, four hundred seventy-one thousand, five hundred fifty-seven".