423401257 has 2 divisors, whose sum is σ = 423401258. Its totient is φ = 423401256.

The previous prime is 423401243. The next prime is 423401281. The reversal of 423401257 is 752104324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330548761 + 92852496 = 18181^2 + 9636^2 .

It is a cyclic number.

It is not a de Polignac number, because 423401257 - 2⁷ = 423401129 is a prime.

It is not a weakly prime, because it can be changed into another prime (423401057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211700628 + 211700629.

It is an arithmetic number, because the mean of its divisors is an integer number (211700629).

Almost surely, 2^423401257 is an apocalyptic number.

It is an amenable number.

423401257 is a deficient number, since it is larger than the sum of its proper divisors (1).

423401257 is an equidigital number, since it uses as much as digits as its factorization.

423401257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 423401257 is about 20576.7163804141. The cubic root of 423401257 is about 750.9033600765.

The spelling of 423401257 in words is "four hundred twenty-three million, four hundred one thousand, two hundred fifty-seven".