121787072 has 28 divisors (see below), whose sum is σ = 263642856. Its totient is φ = 55357440.

The previous prime is 121787063. The next prime is 121787077. The reversal of 121787072 is 270787121.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (121787077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85793 + ... + 87200.

Almost surely, 2^121787072 is an apocalyptic number.

It is an amenable number.

121787072 is an abundant number, since it is smaller than the sum of its proper divisors (141855784).

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

121787072 is a wasteful number, since it uses less digits than its factorization.

121787072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173016 (or 173006 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 35.

The square root of 121787072 is about 11035.7180101704. The cubic root of 121787072 is about 495.6788590626.

The spelling of 121787072 in words is "one hundred twenty-one million, seven hundred eighty-seven thousand, seventy-two".