642154146 has 32 divisors (see below), whose sum is σ = 1297121280. Its totient is φ = 211924944.

The previous prime is 642154127. The next prime is 642154147. The reversal of 642154146 is 641451246.

642154146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (642154147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385311 + ... + 386973.

It is an arithmetic number, because the mean of its divisors is an integer number (40535040).

Almost surely, 2^642154146 is an apocalyptic number.

642154146 is an abundant number, since it is smaller than the sum of its proper divisors (654967134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642154146 is a wasteful number, since it uses less digits than its factorization.

642154146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270.

The product of its digits is 23040, while the sum is 33.

The square root of 642154146 is about 25340.7605647502. The cubic root of 642154146 is about 862.7396613559.

The spelling of 642154146 in words is "six hundred forty-two million, one hundred fifty-four thousand, one hundred forty-six".