1457126809 has 2 divisors, whose sum is σ = 1457126810. Its totient is φ = 1457126808.

The previous prime is 1457126789. The next prime is 1457126813. The reversal of 1457126809 is 9086217541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808151184 + 648975625 = 28428^2 + 25475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1457126809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1457126609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728563404 + 728563405.

It is an arithmetic number, because the mean of its divisors is an integer number (728563405).

Almost surely, 2^1457126809 is an apocalyptic number.

It is an amenable number.

1457126809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457126809 is an equidigital number, since it uses as much as digits as its factorization.

1457126809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1457126809 is about 38172.3304109141. The cubic root of 1457126809 is about 1133.7025310329.

The spelling of 1457126809 in words is "one billion, four hundred fifty-seven million, one hundred twenty-six thousand, eight hundred nine".