121630249 has 4 divisors (see below), whose sum is σ = 130986436. Its totient is φ = 112274064.

The previous prime is 121630247. The next prime is 121630261. The reversal of 121630249 is 942036121.

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 43626025 + 78004224 = 6605^2 + 8832^2 .

It is a cyclic number.

It is not a de Polignac number, because 121630249 - 2¹ = 121630247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121630247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4678074 + ... + 4678099.

It is an arithmetic number, because the mean of its divisors is an integer number (32746609).

Almost surely, 2^121630249 is an apocalyptic number.

It is an amenable number.

121630249 is a deficient number, since it is larger than the sum of its proper divisors (9356187).

121630249 is an equidigital number, since it uses as much as digits as its factorization.

121630249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9356186.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 121630249 is about 11028.6104745793. The cubic root of 121630249 is about 495.4660087882.

The spelling of 121630249 in words is "one hundred twenty-one million, six hundred thirty thousand, two hundred forty-nine".