257406011 has 2 divisors, whose sum is σ = 257406012. Its totient is φ = 257406010.

The previous prime is 257405999. The next prime is 257406049. The reversal of 257406011 is 110604752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257406011 - 2⁶ = 257405947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257402011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128703005 + 128703006.

It is an arithmetic number, because the mean of its divisors is an integer number (128703006).

Almost surely, 2^257406011 is an apocalyptic number.

257406011 is a deficient number, since it is larger than the sum of its proper divisors (1).

257406011 is an equidigital number, since it uses as much as digits as its factorization.

257406011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 257406011 is about 16043.8776796634. The cubic root of 257406011 is about 636.1207487664.

The spelling of 257406011 in words is "two hundred fifty-seven million, four hundred six thousand, eleven".