121254491 has 2 divisors, whose sum is σ = 121254492. Its totient is φ = 121254490.

The previous prime is 121254487. The next prime is 121254503. The reversal of 121254491 is 194452121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121254491 - 2² = 121254487 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121254391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60627245 + 60627246.

It is an arithmetic number, because the mean of its divisors is an integer number (60627246).

Almost surely, 2^121254491 is an apocalyptic number.

121254491 is a deficient number, since it is larger than the sum of its proper divisors (1).

121254491 is an equidigital number, since it uses as much as digits as its factorization.

121254491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 121254491 is about 11011.5616966895. The cubic root of 121254491 is about 494.9552603852.

The spelling of 121254491 in words is "one hundred twenty-one million, two hundred fifty-four thousand, four hundred ninety-one".