1057420305 has 16 divisors (see below), whose sum is σ = 1879858560. Its totient is φ = 563957424.

The previous prime is 1057420297. The next prime is 1057420307. The reversal of 1057420305 is 5030247501.

It is a happy number.

1057420305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1057420305 - 2³ = 1057420297 is a prime.

It is a super-2 number, since 2×1057420305² = 2236275402852586050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1057420307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3916237 + ... + 3916506.

It is an arithmetic number, because the mean of its divisors is an integer number (117491160).

Almost surely, 2^1057420305 is an apocalyptic number.

1057420305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1057420305 is a deficient number, since it is larger than the sum of its proper divisors (822438255).

1057420305 is an equidigital number, since it uses as much as digits as its factorization.

1057420305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832757 (or 7832751 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 1057420305 is about 32517.9997078541. Note that the first 3 decimals coincide. The cubic root of 1057420305 is about 1018.7850152693.

Adding to 1057420305 its reverse (5030247501), we get a palindrome (6087667806).

The spelling of 1057420305 in words is "one billion, fifty-seven million, four hundred twenty thousand, three hundred five".