121670705 has 24 divisors (see below), whose sum is σ = 159671160. Its totient is φ = 88957440.

The previous prime is 121670701. The next prime is 121670711. The reversal of 121670705 is 507076121.

It can be written as a sum of positive squares in 12 ways, for example, as 27793984 + 93876721 = 5272^2 + 9689^2 .

It is not a de Polignac number, because 121670705 - 2² = 121670701 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121670701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91445 + ... + 92765.

It is an arithmetic number, because the mean of its divisors is an integer number (6652965).

Almost surely, 2^121670705 is an apocalyptic number.

It is an amenable number.

121670705 is a deficient number, since it is larger than the sum of its proper divisors (38000455).

121670705 is a wasteful number, since it uses less digits than its factorization.

121670705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 121670705 is about 11030.4444606734. Note that the first 4 decimals coincide. The cubic root of 121670705 is about 495.5209357795.

The spelling of 121670705 in words is "one hundred twenty-one million, six hundred seventy thousand, seven hundred five".