1642145045 has 8 divisors (see below), whose sum is σ = 1971268920. Its totient is φ = 1313252800.

The previous prime is 1642145033. The next prime is 1642145077. The reversal of 1642145045 is 5405412461.

It can be written as a sum of positive squares in 4 ways, for example, as 915788644 + 726356401 = 30262^2 + 26951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1642145045 - 2²⁴ = 1625367829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41906 + ... + 70995.

It is an arithmetic number, because the mean of its divisors is an integer number (246408615).

Almost surely, 2^1642145045 is an apocalyptic number.

It is an amenable number.

1642145045 is a deficient number, since it is larger than the sum of its proper divisors (329123875).

1642145045 is a wasteful number, since it uses less digits than its factorization.

1642145045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115815.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1642145045 is about 40523.3888637167. The cubic root of 1642145045 is about 1179.7876293572.

The spelling of 1642145045 in words is "one billion, six hundred forty-two million, one hundred forty-five thousand, forty-five".