121705497 has 20 divisors (see below), whose sum is σ = 183254016. Its totient is φ = 80491320.

The previous prime is 121705477. The next prime is 121705537. The reversal of 121705497 is 794507121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121705497 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (121705427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4372 + ... + 16202.

Almost surely, 2^121705497 is an apocalyptic number.

It is an amenable number.

121705497 is a deficient number, since it is larger than the sum of its proper divisors (61548519).

121705497 is a wasteful number, since it uses less digits than its factorization.

121705497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11970 (or 11961 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 121705497 is about 11032.0214376151. The cubic root of 121705497 is about 495.5681630376.

The spelling of 121705497 in words is "one hundred twenty-one million, seven hundred five thousand, four hundred ninety-seven".