1355020403 has 16 divisors (see below), whose sum is σ = 1510272000. Its totient is φ = 1205393280.

The previous prime is 1355020393. The next prime is 1355020409. The reversal of 1355020403 is 3040205531.

It is a cyclic number.

It is not a de Polignac number, because 1355020403 - 2⁶ = 1355020339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355020409) 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, 91298 + ... + 105096.

It is an arithmetic number, because the mean of its divisors is an integer number (94392000).

Almost surely, 2^1355020403 is an apocalyptic number.

1355020403 is a deficient number, since it is larger than the sum of its proper divisors (155251597).

1355020403 is a wasteful number, since it uses less digits than its factorization.

1355020403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14002.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1355020403 is about 36810.6017744888. The cubic root of 1355020403 is about 1106.5777787129.

Adding to 1355020403 its reverse (3040205531), we get a palindrome (4395225934).

The spelling of 1355020403 in words is "one billion, three hundred fifty-five million, twenty thousand, four hundred three".