121748671 has 4 divisors (see below), whose sum is σ = 132816744. Its totient is φ = 110680600.

The previous prime is 121748657. The next prime is 121748701. The reversal of 121748671 is 176847121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121748671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121748671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121748651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534020 + ... + 5534041.

It is an arithmetic number, because the mean of its divisors is an integer number (33204186).

Almost surely, 2^121748671 is an apocalyptic number.

121748671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121748671 is a deficient number, since it is larger than the sum of its proper divisors (11068073).

121748671 is a wasteful number, since it uses less digits than its factorization.

121748671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11068072.

The product of its digits is 18816, while the sum is 37.

The square root of 121748671 is about 11033.9780224541. The cubic root of 121748671 is about 495.6267556537.

The spelling of 121748671 in words is "one hundred twenty-one million, seven hundred forty-eight thousand, six hundred seventy-one".