61129 has 2 divisors, whose sum is σ = 61130. Its totient is φ = 61128.
The previous prime is 61121. The next prime is 61141. The reversal of 61129 is 92116.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 38025 + 23104 = 195^2 + 152^2 .
It is a cyclic number.
It is not a de Polignac number, because 61129 - 23 = 61121 is a prime.
It is a nialpdrome in base 16.
It is not a weakly prime, because it can be changed into another prime (61121) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30564 + 30565.
It is an arithmetic number, because the mean of its divisors is an integer number (30565).
261129 is an apocalyptic number.
It is an amenable number.
61129 is a deficient number, since it is larger than the sum of its proper divisors (1).
61129 is an equidigital number, since it uses as much as digits as its factorization.
61129 is an evil number, because the sum of its binary digits is even.
The product of its digits is 108, while the sum is 19.
The square root of 61129 is about 247.2427956483. The cubic root of 61129 is about 39.3927013716.
It can be divided in two parts, 61 and 129, that added together give a triangular number (190 = T19).
The spelling of 61129 in words is "sixty-one thousand, one hundred twenty-nine".
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