121506457 has 2 divisors, whose sum is σ = 121506458. Its totient is φ = 121506456.

The previous prime is 121506419. The next prime is 121506481. The reversal of 121506457 is 754605121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120912016 + 594441 = 10996^2 + 771^2 .

It is a cyclic number.

It is not a de Polignac number, because 121506457 - 2¹⁵ = 121473689 is a prime.

It is equal to p_6922534 and since 121506457 and 6922534 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 (121506257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60753228 + 60753229.

It is an arithmetic number, because the mean of its divisors is an integer number (60753229).

Almost surely, 2^121506457 is an apocalyptic number.

It is an amenable number.

121506457 is a deficient number, since it is larger than the sum of its proper divisors (1).

121506457 is an equidigital number, since it uses as much as digits as its factorization.

121506457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 121506457 is about 11022.9967341009. The cubic root of 121506457 is about 495.2978610653.

It can be divided in two parts, 1215064 and 57, that added together give a palindrome (1215121).

The spelling of 121506457 in words is "one hundred twenty-one million, five hundred six thousand, four hundred fifty-seven".