249425543 has 2 divisors, whose sum is σ = 249425544. Its totient is φ = 249425542.

The previous prime is 249425531. The next prime is 249425611. The reversal of 249425543 is 345524942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249425543 - 2²⁶ = 182316679 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249425497 and 249425506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249422543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124712771 + 124712772.

It is an arithmetic number, because the mean of its divisors is an integer number (124712772).

Almost surely, 2^249425543 is an apocalyptic number.

249425543 is a deficient number, since it is larger than the sum of its proper divisors (1).

249425543 is an equidigital number, since it uses as much as digits as its factorization.

249425543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 38.

The square root of 249425543 is about 15793.2119279138. The cubic root of 249425543 is about 629.4776412528.

It can be divided in two parts, 24942 and 5543, that multiplied together give a triangular number (138253506 = T₁₆₆₂₈).

The spelling of 249425543 in words is "two hundred forty-nine million, four hundred twenty-five thousand, five hundred forty-three".