121477158 has 96 divisors (see below), whose sum is σ = 307786752. Its totient is φ = 35575200.

The previous prime is 121477157. The next prime is 121477159. The reversal of 121477158 is 851774121.

It is an interprime number because it is at equal distance from previous prime (121477157) and next prime (121477159).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121477157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165360 + ... + 166092.

It is an arithmetic number, because the mean of its divisors is an integer number (3206112).

Almost surely, 2^121477158 is an apocalyptic number.

121477158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121477158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153893376).

121477158 is an abundant number, since it is smaller than the sum of its proper divisors (186309594).

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

121477158 is a wasteful number, since it uses less digits than its factorization.

121477158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 780 counting only the distinct ones).

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

The square root of 121477158 is about 11021.6676596602. The cubic root of 121477158 is about 495.2580472728.

The spelling of 121477158 in words is "one hundred twenty-one million, four hundred seventy-seven thousand, one hundred fifty-eight".