249270641 has 2 divisors, whose sum is σ = 249270642. Its totient is φ = 249270640.

The previous prime is 249270569. The next prime is 249270653. The reversal of 249270641 is 146072942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141110641 + 108160000 = 11879^2 + 10400^2 .

It is a cyclic number.

It is not a de Polignac number, because 249270641 - 2¹⁰ = 249269617 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 (249270661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124635320 + 124635321.

It is an arithmetic number, because the mean of its divisors is an integer number (124635321).

Almost surely, 2^249270641 is an apocalyptic number.

It is an amenable number.

249270641 is a deficient number, since it is larger than the sum of its proper divisors (1).

249270641 is an equidigital number, since it uses as much as digits as its factorization.

249270641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 249270641 is about 15788.3070973426. The cubic root of 249270641 is about 629.3473050456.

The spelling of 249270641 in words is "two hundred forty-nine million, two hundred seventy thousand, six hundred forty-one".