121625166 has 16 divisors (see below), whose sum is σ = 261962064. Its totient is φ = 37423104.

The previous prime is 121625117. The next prime is 121625209. The reversal of 121625166 is 661526121.

121625166 = T₁₃₈₃ + T₁₃₈₄ + ... + T₁₄₉₉.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779571 + ... + 779726.

It is an arithmetic number, because the mean of its divisors is an integer number (16372629).

Almost surely, 2^121625166 is an apocalyptic number.

121625166 is an abundant number, since it is smaller than the sum of its proper divisors (140336898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121625166 is a wasteful number, since it uses less digits than its factorization.

121625166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559315.

The product of its digits is 4320, while the sum is 30.

The square root of 121625166 is about 11028.3800260963. The cubic root of 121625166 is about 495.4591067529.

The spelling of 121625166 in words is "one hundred twenty-one million, six hundred twenty-five thousand, one hundred sixty-six".