121867447 has 16 divisors (see below), whose sum is σ = 134178912. Its totient is φ = 109998720.

The previous prime is 121867429. The next prime is 121867477. The reversal of 121867447 is 744768121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121867447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121867477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179673 + ... + 180349.

It is an arithmetic number, because the mean of its divisors is an integer number (8386182).

Almost surely, 2^121867447 is an apocalyptic number.

121867447 is a deficient number, since it is larger than the sum of its proper divisors (12311465).

121867447 is a wasteful number, since it uses less digits than its factorization.

121867447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 75264, while the sum is 40.

The square root of 121867447 is about 11039.3589940721. The cubic root of 121867447 is about 495.7878783712.

The spelling of 121867447 in words is "one hundred twenty-one million, eight hundred sixty-seven thousand, four hundred forty-seven".