121505479 has 2 divisors, whose sum is σ = 121505480. Its totient is φ = 121505478.

The previous prime is 121505471. The next prime is 121505491. The reversal of 121505479 is 974505121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121505479 - 2³ = 121505471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121505471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60752739 + 60752740.

It is an arithmetic number, because the mean of its divisors is an integer number (60752740).

Almost surely, 2^121505479 is an apocalyptic number.

121505479 is a deficient number, since it is larger than the sum of its proper divisors (1).

121505479 is an equidigital number, since it uses as much as digits as its factorization.

121505479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 121505479 is about 11022.9523722095. The cubic root of 121505479 is about 495.2965321850.

The spelling of 121505479 in words is "one hundred twenty-one million, five hundred five thousand, four hundred seventy-nine".