121243760 has 40 divisors (see below), whose sum is σ = 307520496. Its totient is φ = 44088320.

The previous prime is 121243757. The next prime is 121243777. The reversal of 121243760 is 67342121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68009 + ... + 69768.

Almost surely, 2^121243760 is an apocalyptic number.

121243760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121243760 is an abundant number, since it is smaller than the sum of its proper divisors (186276736).

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

121243760 is a wasteful number, since it uses less digits than its factorization.

121243760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137801 (or 137795 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 121243760 is about 11011.0744253229. The cubic root of 121243760 is about 494.9406588048.

Adding to 121243760 its reverse (67342121), we get a palindrome (188585881).

The spelling of 121243760 in words is "one hundred twenty-one million, two hundred forty-three thousand, seven hundred sixty".