121634646 has 16 divisors (see below), whose sum is σ = 278022144. Its totient is φ = 34752744.

The previous prime is 121634593. The next prime is 121634647. The reversal of 121634646 is 646436121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121634647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1447990 + ... + 1448073.

It is an arithmetic number, because the mean of its divisors is an integer number (17376384).

Almost surely, 2^121634646 is an apocalyptic number.

121634646 is an abundant number, since it is smaller than the sum of its proper divisors (156387498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121634646 is a wasteful number, since it uses less digits than its factorization.

121634646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896075.

The product of its digits is 20736, while the sum is 33.

The square root of 121634646 is about 11028.8098179269. The cubic root of 121634646 is about 495.4719791719.

The spelling of 121634646 in words is "one hundred twenty-one million, six hundred thirty-four thousand, six hundred forty-six".