251134129 has 2 divisors, whose sum is σ = 251134130. Its totient is φ = 251134128.

The previous prime is 251134123. The next prime is 251134139. The reversal of 251134129 is 921431152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191767104 + 59367025 = 13848^2 + 7705^2 .

It is a cyclic number.

It is not a de Polignac number, because 251134129 - 2¹⁷ = 251003057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251134097 and 251134106.

It is not a weakly prime, because it can be changed into another prime (251134123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125567064 + 125567065.

It is an arithmetic number, because the mean of its divisors is an integer number (125567065).

Almost surely, 2^251134129 is an apocalyptic number.

It is an amenable number.

251134129 is a deficient number, since it is larger than the sum of its proper divisors (1).

251134129 is an equidigital number, since it uses as much as digits as its factorization.

251134129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 251134129 is about 15847.2120260947. The cubic root of 251134129 is about 630.9116967258.

The spelling of 251134129 in words is "two hundred fifty-one million, one hundred thirty-four thousand, one hundred twenty-nine".