1021403457 has 12 divisors (see below), whose sum is σ = 1500367440. Its totient is φ = 669394008.

The previous prime is 1021403443. The next prime is 1021403557. The reversal of 1021403457 is 7543041201.

It is not a de Polignac number, because 1021403457 - 2¹⁰ = 1021402433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021403457.

It is not an unprimeable number, because it can be changed into a prime (1021403057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 961243 + ... + 962304.

It is an arithmetic number, because the mean of its divisors is an integer number (125030620).

Almost surely, 2^1021403457 is an apocalyptic number.

It is an amenable number.

1021403457 is a deficient number, since it is larger than the sum of its proper divisors (478963983).

1021403457 is a wasteful number, since it uses less digits than its factorization.

1021403457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923612 (or 1923609 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1021403457 is about 31959.4032641412. The cubic root of 1021403457 is about 1007.0841815307.

Adding to 1021403457 its reverse (7543041201), we get a palindrome (8564444658).

The spelling of 1021403457 in words is "one billion, twenty-one million, four hundred three thousand, four hundred fifty-seven".