642132154 has 8 divisors (see below), whose sum is σ = 977574528. Its totient is φ = 316273980.

The previous prime is 642132137. The next prime is 642132157. The reversal of 642132154 is 451231246.

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

It is not an unprimeable number, because it can be changed into a prime (642132157) 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, 2395882 + ... + 2396149.

It is an arithmetic number, because the mean of its divisors is an integer number (122196816).

Almost surely, 2^642132154 is an apocalyptic number.

642132154 is a deficient number, since it is larger than the sum of its proper divisors (335442374).

642132154 is a wasteful number, since it uses less digits than its factorization.

642132154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792100.

The product of its digits is 5760, while the sum is 28.

The square root of 642132154 is about 25340.3266356217. The cubic root of 642132154 is about 862.7298124292.

The spelling of 642132154 in words is "six hundred forty-two million, one hundred thirty-two thousand, one hundred fifty-four".