427457257 has 2 divisors, whose sum is σ = 427457258. Its totient is φ = 427457256.

The previous prime is 427457249. The next prime is 427457287. The reversal of 427457257 is 752754724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328733161 + 98724096 = 18131^2 + 9936^2 .

It is a cyclic number.

It is not a de Polignac number, because 427457257 - 2³ = 427457249 is a prime.

It is not a weakly prime, because it can be changed into another prime (427457207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213728628 + 213728629.

It is an arithmetic number, because the mean of its divisors is an integer number (213728629).

Almost surely, 2^427457257 is an apocalyptic number.

It is an amenable number.

427457257 is a deficient number, since it is larger than the sum of its proper divisors (1).

427457257 is an equidigital number, since it uses as much as digits as its factorization.

427457257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 548800, while the sum is 43.

The square root of 427457257 is about 20675.0394679188. The cubic root of 427457257 is about 753.2935199458.

The spelling of 427457257 in words is "four hundred twenty-seven million, four hundred fifty-seven thousand, two hundred fifty-seven".