121746657 has 4 divisors (see below), whose sum is σ = 162328880. Its totient is φ = 81164436.

The previous prime is 121746649. The next prime is 121746679. The reversal of 121746657 is 756647121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756647121 = 3 ⋅252215707.

It is not a de Polignac number, because 121746657 - 2³ = 121746649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121746607) 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, 20291107 + ... + 20291112.

It is an arithmetic number, because the mean of its divisors is an integer number (40582220).

Almost surely, 2^121746657 is an apocalyptic number.

It is an amenable number.

121746657 is a deficient number, since it is larger than the sum of its proper divisors (40582223).

121746657 is an equidigital number, since it uses as much as digits as its factorization.

121746657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40582222.

The product of its digits is 70560, while the sum is 39.

The square root of 121746657 is about 11033.8867585271. The cubic root of 121746657 is about 495.6240227073.

It can be divided in two parts, 1217 and 46657, that added together give a palindrome (47874).

The spelling of 121746657 in words is "one hundred twenty-one million, seven hundred forty-six thousand, six hundred fifty-seven".