649142 has 8 divisors (see below), whose sum is σ = 1048656. Its totient is φ = 299592.

The previous prime is 649141. The next prime is 649147. The reversal of 649142 is 241946.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 24967 = 649142 / (6 + 4 + 9 + 1 + 4 + 2).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649142.

It is not an unprimeable number, because it can be changed into a prime (649141) 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, 12458 + ... + 12509.

It is an arithmetic number, because the mean of its divisors is an integer number (131082).

2⁶⁴⁹¹⁴² is an apocalyptic number.

649142 is a deficient number, since it is larger than the sum of its proper divisors (399514).

649142 is a wasteful number, since it uses less digits than its factorization.

649142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24982.

The product of its digits is 1728, while the sum is 26.

The square root of 649142 is about 805.6934901065. The cubic root of 649142 is about 86.5857792308.

The spelling of 649142 in words is "six hundred forty-nine thousand, one hundred forty-two".