1057520403 has 12 divisors (see below), whose sum is σ = 1527823440. Its totient is φ = 704877936.

The previous prime is 1057520389. The next prime is 1057520417. The reversal of 1057520403 is 3040257501.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1057520389) and next prime (1057520417).

It is not a de Polignac number, because 1057520403 - 2⁹ = 1057519891 is a prime.

It is a super-3 number, since 3×1057520403³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1057520423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65578 + ... + 80096.

It is an arithmetic number, because the mean of its divisors is an integer number (127318620).

Almost surely, 2^1057520403 is an apocalyptic number.

1057520403 is a deficient number, since it is larger than the sum of its proper divisors (470303037).

1057520403 is a wasteful number, since it uses less digits than its factorization.

1057520403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618 (or 22615 counting only the distinct ones).

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

The square root of 1057520403 is about 32519.5387882424. The cubic root of 1057520403 is about 1018.8171611512.

Adding to 1057520403 its reverse (3040257501), we get a palindrome (4097777904).

The spelling of 1057520403 in words is "one billion, fifty-seven million, five hundred twenty thousand, four hundred three".