118651261 has 2 divisors, whose sum is σ = 118651262. Its totient is φ = 118651260.

The previous prime is 118651249. The next prime is 118651303. The reversal of 118651261 is 162156811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115154361 + 3496900 = 10731^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 118651261 - 2⁷ = 118651133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118651231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59325630 + 59325631.

It is an arithmetic number, because the mean of its divisors is an integer number (59325631).

Almost surely, 2^118651261 is an apocalyptic number.

It is an amenable number.

118651261 is a deficient number, since it is larger than the sum of its proper divisors (1).

118651261 is an equidigital number, since it uses as much as digits as its factorization.

118651261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 31.

The square root of 118651261 is about 10892.7159606776. The cubic root of 118651261 is about 491.3875167027.

The spelling of 118651261 in words is "one hundred eighteen million, six hundred fifty-one thousand, two hundred sixty-one".