1011403 has 6 divisors (see below), whose sum is σ = 1037364. Its totient is φ = 986076.

The previous prime is 1011397. The next prime is 1011407. The reversal of 1011403 is 3041101.

It is a happy number.

It is not a de Polignac number, because 1011403 - 2⁵ = 1011371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011403.

It is not an unprimeable number, because it can be changed into a prime (1011407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1576 + ... + 2122.

It is an arithmetic number, because the mean of its divisors is an integer number (172894).

2^1011403 is an apocalyptic number.

1011403 is a deficient number, since it is larger than the sum of its proper divisors (25961).

1011403 is an frugal number, since it uses more digits than its factorization.

1011403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1011403 is about 1005.6853384633. The cubic root of 1011403 is about 100.3786643235.

Adding to 1011403 its reverse (3041101), we get a palindrome (4052504).

The spelling of 1011403 in words is "one million, eleven thousand, four hundred three".