257126423 has 2 divisors, whose sum is σ = 257126424. Its totient is φ = 257126422.

The previous prime is 257126351. The next prime is 257126437. The reversal of 257126423 is 324621752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257126423 - 2¹⁰ = 257125399 is a prime.

It is a super-2 number, since 2×257126423² = 132227994809549858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257126423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257126483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128563211 + 128563212.

It is an arithmetic number, because the mean of its divisors is an integer number (128563212).

Almost surely, 2^257126423 is an apocalyptic number.

257126423 is a deficient number, since it is larger than the sum of its proper divisors (1).

257126423 is an equidigital number, since it uses as much as digits as its factorization.

257126423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 257126423 is about 16035.1620821244. The cubic root of 257126423 is about 635.8903524899.

The spelling of 257126423 in words is "two hundred fifty-seven million, one hundred twenty-six thousand, four hundred twenty-three".