1645504142 has 8 divisors (see below), whose sum is σ = 2468440056. Its totient is φ = 822690792.

The previous prime is 1645504067. The next prime is 1645504151. The reversal of 1645504142 is 2414055461.

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

It is a junction number, because it is equal to n+sod(n) for n = 1645504099 and 1645504108.

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 3 ways as a sum of consecutive naturals, for example, 19028 + ... + 60440.

It is an arithmetic number, because the mean of its divisors is an integer number (308555007).

Almost surely, 2^1645504142 is an apocalyptic number.

1645504142 is a deficient number, since it is larger than the sum of its proper divisors (822935914).

1645504142 is a wasteful number, since it uses less digits than its factorization.

1645504142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61282.

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

The square root of 1645504142 is about 40564.8140880739. The cubic root of 1645504142 is about 1180.5915213913.

The spelling of 1645504142 in words is "one billion, six hundred forty-five million, five hundred four thousand, one hundred forty-two".