121954867 has 4 divisors (see below), whose sum is σ = 122036056. Its totient is φ = 121873680.

The previous prime is 121954841. The next prime is 121954871. The reversal of 121954867 is 768459121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121954867 - 2⁷ = 121954739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121954897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38298 + ... + 41359.

It is an arithmetic number, because the mean of its divisors is an integer number (30509014).

Almost surely, 2^121954867 is an apocalyptic number.

121954867 is a deficient number, since it is larger than the sum of its proper divisors (81189).

121954867 is an equidigital number, since it uses as much as digits as its factorization.

121954867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81188.

The product of its digits is 120960, while the sum is 43.

The square root of 121954867 is about 11043.3177532841. The cubic root of 121954867 is about 495.9063989933.

The spelling of 121954867 in words is "one hundred twenty-one million, nine hundred fifty-four thousand, eight hundred sixty-seven".