121563457 has 2 divisors, whose sum is σ = 121563458. Its totient is φ = 121563456.

The previous prime is 121563443. The next prime is 121563509. The reversal of 121563457 is 754365121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65028096 + 56535361 = 8064^2 + 7519^2 .

It is a cyclic number.

It is not a de Polignac number, because 121563457 - 2¹¹ = 121561409 is a prime.

It is not a weakly prime, because it can be changed into another prime (121563427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60781728 + 60781729.

It is an arithmetic number, because the mean of its divisors is an integer number (60781729).

Almost surely, 2^121563457 is an apocalyptic number.

It is an amenable number.

121563457 is a deficient number, since it is larger than the sum of its proper divisors (1).

121563457 is an equidigital number, since it uses as much as digits as its factorization.

121563457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 121563457 is about 11025.5819347552. The cubic root of 121563457 is about 495.3752988281.

The spelling of 121563457 in words is "one hundred twenty-one million, five hundred sixty-three thousand, four hundred fifty-seven".