1026403 has 6 divisors (see below), whose sum is σ = 1194036. Its totient is φ = 879732.

The previous prime is 1026401. The next prime is 1026407. The reversal of 1026403 is 3046201.

It is not a de Polignac number, because 1026403 - 2¹ = 1026401 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (1026401) 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, 10425 + ... + 10522.

It is an arithmetic number, because the mean of its divisors is an integer number (199006).

2^1026403 is an apocalyptic number.

1026403 is a deficient number, since it is larger than the sum of its proper divisors (167633).

1026403 is an equidigital number, since it uses as much as digits as its factorization.

1026403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20961 (or 20954 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1026403 is about 1013.1154919356. The cubic root of 1026403 is about 100.8724658953.

The spelling of 1026403 in words is "one million, twenty-six thousand, four hundred three".