121240735 has 32 divisors (see below), whose sum is σ = 187660800. Its totient is φ = 72965760.

The previous prime is 121240727. The next prime is 121240739. The reversal of 121240735 is 537042121.

It is a happy number.

It is not a de Polignac number, because 121240735 - 2³ = 121240727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5736 + ... + 16594.

It is an arithmetic number, because the mean of its divisors is an integer number (5864400).

Almost surely, 2^121240735 is an apocalyptic number.

121240735 is a deficient number, since it is larger than the sum of its proper divisors (66420065).

121240735 is a wasteful number, since it uses less digits than its factorization.

121240735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10911.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 121240735 is about 11010.9370627572. The cubic root of 121240735 is about 494.9365425574.

Adding to 121240735 its reverse (537042121), we get a palindrome (658282856).

The spelling of 121240735 in words is "one hundred twenty-one million, two hundred forty thousand, seven hundred thirty-five".