121877972 has 12 divisors (see below), whose sum is σ = 213405780. Its totient is φ = 60904896.

The previous prime is 121877969. The next prime is 121877993. The reversal of 121877972 is 279778121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91891396 + 29986576 = 9586^2 + 5476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 15624.

It is an arithmetic number, because the mean of its divisors is an integer number (17783815).

Almost surely, 2^121877972 is an apocalyptic number.

It is an amenable number.

121877972 is a deficient number, since it is larger than the sum of its proper divisors (91527808).

121877972 is a wasteful number, since it uses less digits than its factorization.

121877972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17050 (or 17048 counting only the distinct ones).

The product of its digits is 98784, while the sum is 44.

The square root of 121877972 is about 11039.8356871830. The cubic root of 121877972 is about 495.8021507558.

The spelling of 121877972 in words is "one hundred twenty-one million, eight hundred seventy-seven thousand, nine hundred seventy-two".