257402419 has 2 divisors, whose sum is σ = 257402420. Its totient is φ = 257402418.

The previous prime is 257402413. The next prime is 257402471. The reversal of 257402419 is 914204752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257402419 - 2¹⁹ = 256878131 is a prime.

It is a super-2 number, since 2×257402419² = 132512010614103122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257402413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128701209 + 128701210.

It is an arithmetic number, because the mean of its divisors is an integer number (128701210).

Almost surely, 2^257402419 is an apocalyptic number.

257402419 is a deficient number, since it is larger than the sum of its proper divisors (1).

257402419 is an equidigital number, since it uses as much as digits as its factorization.

257402419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 257402419 is about 16043.7657362603. The cubic root of 257402419 is about 636.1177898141.

The spelling of 257402419 in words is "two hundred fifty-seven million, four hundred two thousand, four hundred nineteen".