121682538 has 12 divisors (see below), whose sum is σ = 263645538. Its totient is φ = 40560840.

The previous prime is 121682537. The next prime is 121682557. The reversal of 121682538 is 835286121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 76160529 + 45522009 = 8727^2 + 6747^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121682537) 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 5 ways as a sum of consecutive naturals, for example, 3380053 + ... + 3380088.

Almost surely, 2^121682538 is an apocalyptic number.

121682538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121682538 is an abundant number, since it is smaller than the sum of its proper divisors (141963000).

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

121682538 is a wasteful number, since it uses less digits than its factorization.

121682538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760149 (or 6760146 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 121682538 is about 11030.9808267443. The cubic root of 121682538 is about 495.5369991070.

It can be divided in two parts, 12168 and 2538, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 121682538 in words is "one hundred twenty-one million, six hundred eighty-two thousand, five hundred thirty-eight".