121472137 has 2 divisors, whose sum is σ = 121472138. Its totient is φ = 121472136.

The previous prime is 121472129. The next prime is 121472161. The reversal of 121472137 is 731274121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72318016 + 49154121 = 8504^2 + 7011^2 .

It is a cyclic number.

It is not a de Polignac number, because 121472137 - 2³ = 121472129 is a prime.

It is not a weakly prime, because it can be changed into another prime (121472437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60736068 + 60736069.

It is an arithmetic number, because the mean of its divisors is an integer number (60736069).

Almost surely, 2^121472137 is an apocalyptic number.

It is an amenable number.

121472137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121472137 is an equidigital number, since it uses as much as digits as its factorization.

121472137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 28.

The square root of 121472137 is about 11021.4398787091. The cubic root of 121472137 is about 495.2512236994.

The spelling of 121472137 in words is "one hundred twenty-one million, four hundred seventy-two thousand, one hundred thirty-seven".