121250705 has 4 divisors (see below), whose sum is σ = 145500852. Its totient is φ = 97000560.

The previous prime is 121250699. The next prime is 121250713. The reversal of 121250705 is 507052121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58967041 + 62283664 = 7679^2 + 7892^2 .

It is not a de Polignac number, because 121250705 - 2⁸ = 121250449 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12125066 + ... + 12125075.

It is an arithmetic number, because the mean of its divisors is an integer number (36375213).

Almost surely, 2^121250705 is an apocalyptic number.

It is an amenable number.

121250705 is a deficient number, since it is larger than the sum of its proper divisors (24250147).

121250705 is an equidigital number, since it uses as much as digits as its factorization.

121250705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24250146.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 121250705 is about 11011.3897851270. The cubic root of 121250705 is about 494.9501089056.

The spelling of 121250705 in words is "one hundred twenty-one million, two hundred fifty thousand, seven hundred five".