121240457 has 8 divisors (see below), whose sum is σ = 132780480. Its totient is φ = 110016720.

The previous prime is 121240451. The next prime is 121240487. The reversal of 121240457 is 754042121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121240457 - 2⁶ = 121240393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121240451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78269 + ... + 79802.

It is an arithmetic number, because the mean of its divisors is an integer number (16597560).

Almost surely, 2^121240457 is an apocalyptic number.

It is an amenable number.

121240457 is a deficient number, since it is larger than the sum of its proper divisors (11540023).

121240457 is a wasteful number, since it uses less digits than its factorization.

121240457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158143.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 121240457 is about 11010.9244389379. The cubic root of 121240457 is about 494.9361642674.

Adding to 121240457 its reverse (754042121), we get a palindrome (875282578).

The spelling of 121240457 in words is "one hundred twenty-one million, two hundred forty thousand, four hundred fifty-seven".