1642256003 has 2 divisors, whose sum is σ = 1642256004. Its totient is φ = 1642256002.

The previous prime is 1642255903. The next prime is 1642256017. The reversal of 1642256003 is 3006522461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642256003 - 2¹² = 1642251907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642256023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821128001 + 821128002.

It is an arithmetic number, because the mean of its divisors is an integer number (821128002).

Almost surely, 2^1642256003 is an apocalyptic number.

1642256003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642256003 is an equidigital number, since it uses as much as digits as its factorization.

1642256003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1642256003 is about 40524.7579018062. The cubic root of 1642256003 is about 1179.8142010919.

Adding to 1642256003 its reverse (3006522461), we get a palindrome (4648778464).

The spelling of 1642256003 in words is "one billion, six hundred forty-two million, two hundred fifty-six thousand, three".