249999601 has 2 divisors, whose sum is σ = 249999602. Its totient is φ = 249999600.

The previous prime is 249999599. The next prime is 249999623. The reversal of 249999601 is 106999942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235929600 + 14070001 = 15360^2 + 3751^2 .

It is a cyclic number.

It is not a de Polignac number, because 249999601 - 2¹ = 249999599 is a prime.

Together with 249999599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (249999641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124999800 + 124999801.

It is an arithmetic number, because the mean of its divisors is an integer number (124999801).

Almost surely, 2^249999601 is an apocalyptic number.

It is an amenable number.

249999601 is a deficient number, since it is larger than the sum of its proper divisors (1).

249999601 is an equidigital number, since it uses as much as digits as its factorization.

249999601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 249999601 is about 15811.3756833490. The cubic root of 249999601 is about 629.9601898083.

The spelling of 249999601 in words is "two hundred forty-nine million, nine hundred ninety-nine thousand, six hundred one".