121420609 has 8 divisors (see below), whose sum is σ = 122360000. Its totient is φ = 120485232.

The previous prime is 121420603. The next prime is 121420661. The reversal of 121420609 is 906024121.

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 121420609 - 2⁵ = 121420577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121420603) 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, 86092 + ... + 87490.

It is an arithmetic number, because the mean of its divisors is an integer number (15295000).

Almost surely, 2^121420609 is an apocalyptic number.

It is an amenable number.

121420609 is a deficient number, since it is larger than the sum of its proper divisors (939391).

121420609 is a wasteful number, since it uses less digits than its factorization.

121420609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 121420609 is about 11019.1020051545. The cubic root of 121420609 is about 495.1811859252.

The spelling of 121420609 in words is "one hundred twenty-one million, four hundred twenty thousand, six hundred nine".