142649 has 4 divisors (see below), whose sum is σ = 153636. Its totient is φ = 131664.

The previous prime is 142619. The next prime is 142657. The reversal of 142649 is 946241.

142649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48400 + 94249 = 220^2 + 307^2 .

It is a de Polignac number, because none of the positive numbers 2^k-142649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5474 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (38409).

2¹⁴²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

142649 is a deficient number, since it is larger than the sum of its proper divisors (10987).

142649 is a wasteful number, since it uses less digits than its factorization.

142649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986.

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

The square root of 142649 is about 377.6890255223. The cubic root of 142649 is about 52.2503949056.

The spelling of 142649 in words is "one hundred forty-two thousand, six hundred forty-nine".