265940249 has 2 divisors, whose sum is σ = 265940250. Its totient is φ = 265940248.

The previous prime is 265940243. The next prime is 265940267. The reversal of 265940249 is 942049562.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157051024 + 108889225 = 12532^2 + 10435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265940249 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265940243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132970124 + 132970125.

It is an arithmetic number, because the mean of its divisors is an integer number (132970125).

Almost surely, 2^265940249 is an apocalyptic number.

It is an amenable number.

265940249 is a deficient number, since it is larger than the sum of its proper divisors (1).

265940249 is an equidigital number, since it uses as much as digits as its factorization.

265940249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 265940249 is about 16307.6745429874. The cubic root of 265940249 is about 643.0746011109.

The spelling of 265940249 in words is "two hundred sixty-five million, nine hundred forty thousand, two hundred forty-nine".