121263449 has 2 divisors, whose sum is σ = 121263450. Its totient is φ = 121263448.

The previous prime is 121263409. The next prime is 121263451. The reversal of 121263449 is 944362121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92833225 + 28430224 = 9635^2 + 5332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121263449 is a prime.

It is a Sophie Germain prime.

Together with 121263451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_6909503 and since 121263449 and 6909503 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121263409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60631724 + 60631725.

It is an arithmetic number, because the mean of its divisors is an integer number (60631725).

Almost surely, 2^121263449 is an apocalyptic number.

It is an amenable number.

121263449 is a deficient number, since it is larger than the sum of its proper divisors (1).

121263449 is an equidigital number, since it uses as much as digits as its factorization.

121263449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 121263449 is about 11011.9684434709. The cubic root of 121263449 is about 494.9674487999.

The spelling of 121263449 in words is "one hundred twenty-one million, two hundred sixty-three thousand, four hundred forty-nine".