2056403 has 2 divisors, whose sum is σ = 2056404. Its totient is φ = 2056402.

The previous prime is 2056399. The next prime is 2056409. The reversal of 2056403 is 3046502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2056403 - 2² = 2056399 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2056409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028201 + 1028202.

It is an arithmetic number, because the mean of its divisors is an integer number (1028202).

2^2056403 is an apocalyptic number.

2056403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056403 is an equidigital number, since it uses as much as digits as its factorization.

2056403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2056403 is about 1434.0163876330. The cubic root of 2056403 is about 127.1655311520.

Subtracting 2056403 from its reverse (3046502), we obtain a palindrome (990099).

The spelling of 2056403 in words is "two million, fifty-six thousand, four hundred three".