121575777 has 8 divisors (see below), whose sum is σ = 162180480. Its totient is φ = 81010800.

The previous prime is 121575767. The next prime is 121575803. The reversal of 121575777 is 777575121.

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

It is not a de Polignac number, because 121575777 - 2⁴ = 121575761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121575757) 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, 1849 + ... + 15702.

It is an arithmetic number, because the mean of its divisors is an integer number (20272560).

Almost surely, 2^121575777 is an apocalyptic number.

It is an amenable number.

121575777 is a deficient number, since it is larger than the sum of its proper divisors (40604703).

121575777 is a wasteful number, since it uses less digits than its factorization.

121575777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19863.

The product of its digits is 120050, while the sum is 42.

The square root of 121575777 is about 11026.1406212691. The cubic root of 121575777 is about 495.3920330717.

The spelling of 121575777 in words is "one hundred twenty-one million, five hundred seventy-five thousand, seven hundred seventy-seven".