121280619 has 8 divisors (see below), whose sum is σ = 161758720. Its totient is φ = 80828136.

The previous prime is 121280603. The next prime is 121280647. The reversal of 121280619 is 916082121.

It is a happy number.

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

It is not a de Polignac number, because 121280619 - 2⁴ = 121280603 is a prime.

It is a super-2 number, since 2×121280619² = 29417977090046322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121280689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13362 + ... + 20520.

It is an arithmetic number, because the mean of its divisors is an integer number (20219840).

Almost surely, 2^121280619 is an apocalyptic number.

121280619 is a deficient number, since it is larger than the sum of its proper divisors (40478101).

121280619 is an equidigital number, since it uses as much as digits as its factorization.

121280619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12809.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 121280619 is about 11012.7480221787. The cubic root of 121280619 is about 494.9908089305.

The spelling of 121280619 in words is "one hundred twenty-one million, two hundred eighty thousand, six hundred nineteen".