121240254 has 32 divisors (see below), whose sum is σ = 255905280. Its totient is φ = 38187072.

The previous prime is 121240253. The next prime is 121240261. The reversal of 121240254 is 452042121.

It is a self number, because there is not a number n which added to its sum of digits gives 121240254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240253) 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 15 ways as a sum of consecutive naturals, for example, 51634 + ... + 53930.

It is an arithmetic number, because the mean of its divisors is an integer number (7997040).

Almost surely, 2^121240254 is an apocalyptic number.

121240254 is an abundant number, since it is smaller than the sum of its proper divisors (134665026).

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

121240254 is a wasteful number, since it uses less digits than its factorization.

121240254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 121240254 is about 11010.9152208161. The cubic root of 121240254 is about 494.9358880337.

Adding to 121240254 its reverse (452042121), we get a palindrome (573282375).

The spelling of 121240254 in words is "one hundred twenty-one million, two hundred forty thousand, two hundred fifty-four".