1642500133 has 4 divisors (see below), whose sum is σ = 1642612300. Its totient is φ = 1642387968.

The previous prime is 1642500113. The next prime is 1642500149. The reversal of 1642500133 is 3310052461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 672987364 + 969512769 = 25942^2 + 31137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642500133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642500098 and 1642500107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642500103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30108 + ... + 64741.

It is an arithmetic number, because the mean of its divisors is an integer number (410653075).

Almost surely, 2^1642500133 is an apocalyptic number.

It is an amenable number.

1642500133 is a deficient number, since it is larger than the sum of its proper divisors (112167).

1642500133 is an equidigital number, since it uses as much as digits as its factorization.

1642500133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112166.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1642500133 is about 40527.7698991691. The cubic root of 1642500133 is about 1179.8726600592.

Adding to 1642500133 its reverse (3310052461), we get a palindrome (4952552594).

The spelling of 1642500133 in words is "one billion, six hundred forty-two million, five hundred thousand, one hundred thirty-three".