121678730 has 8 divisors (see below), whose sum is σ = 219021732. Its totient is φ = 48671488.

The previous prime is 121678721. The next prime is 121678757. The reversal of 121678730 is 37876121.

It can be written as a sum of positive squares in 2 ways, for example, as 116402521 + 5276209 = 10789^2 + 2297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6083927 + ... + 6083946.

Almost surely, 2^121678730 is an apocalyptic number.

121678730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121678730 is a deficient number, since it is larger than the sum of its proper divisors (97343002).

121678730 is a wasteful number, since it uses less digits than its factorization.

121678730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12167880.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 121678730 is about 11030.8082206156. The cubic root of 121678730 is about 495.5318298510.

The spelling of 121678730 in words is "one hundred twenty-one million, six hundred seventy-eight thousand, seven hundred thirty".