4257259781 has 2 divisors, whose sum is σ = 4257259782. Its totient is φ = 4257259780.

The previous prime is 4257259751. The next prime is 4257259789. The reversal of 4257259781 is 1879527524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2595393025 + 1661866756 = 50945^2 + 40766^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257259781 - 2¹⁰ = 4257258757 is a prime.

It is a super-2 number, since 2×4257259781² = 36248521685840335922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4257259789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128629890 + 2128629891.

It is an arithmetic number, because the mean of its divisors is an integer number (2128629891).

Almost surely, 2^4257259781 is an apocalyptic number.

It is an amenable number.

4257259781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4257259781 is an equidigital number, since it uses as much as digits as its factorization.

4257259781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 50.

The square root of 4257259781 is about 65247.6802729415. The cubic root of 4257259781 is about 1620.7276846928.

The spelling of 4257259781 in words is "four billion, two hundred fifty-seven million, two hundred fifty-nine thousand, seven hundred eighty-one".