121742650 has 12 divisors (see below), whose sum is σ = 226441422. Its totient is φ = 48697040.

The previous prime is 121742629. The next prime is 121742659. The reversal of 121742650 is 56247121.

It can be written as a sum of positive squares in 3 ways, for example, as 60699681 + 61042969 = 7791^2 + 7813^2 .

It is not an unprimeable number, because it can be changed into a prime (121742659) 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, 1217377 + ... + 1217476.

Almost surely, 2^121742650 is an apocalyptic number.

121742650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121742650 is a deficient number, since it is larger than the sum of its proper divisors (104698772).

121742650 is a wasteful number, since it uses less digits than its factorization.

121742650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434865 (or 2434860 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 121742650 is about 11033.7051800381. The cubic root of 121742650 is about 495.6185852212.

Adding to 121742650 its reverse (56247121), we get a palindrome (177989771).

The spelling of 121742650 in words is "one hundred twenty-one million, seven hundred forty-two thousand, six hundred fifty".