121263665 has 8 divisors (see below), whose sum is σ = 146321448. Its totient is φ = 96474240.

The previous prime is 121263631. The next prime is 121263673. The reversal of 121263665 is 566362121.

It can be written as a sum of positive squares in 4 ways, for example, as 351649 + 120912016 = 593^2 + 10996^2 .

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

It is not a de Polignac number, because 121263665 - 2⁸ = 121263409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66092 + ... + 67901.

It is an arithmetic number, because the mean of its divisors is an integer number (18290181).

Almost surely, 2^121263665 is an apocalyptic number.

It is an amenable number.

121263665 is a deficient number, since it is larger than the sum of its proper divisors (25057783).

121263665 is a wasteful number, since it uses less digits than its factorization.

121263665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134179.

The product of its digits is 12960, while the sum is 32.

The square root of 121263665 is about 11011.9782509774. The cubic root of 121263665 is about 494.9677426859.

The spelling of 121263665 in words is "one hundred twenty-one million, two hundred sixty-three thousand, six hundred sixty-five".