142649849 has 6 divisors (see below), whose sum is σ = 144145134. Its totient is φ = 141169920.

The previous prime is 142649833. The next prime is 142649861. The reversal of 142649849 is 948946241.

It can be written as a sum of positive squares in 3 ways, for example, as 18550249 + 124099600 = 4307^2 + 11140^2 .

It is not a de Polignac number, because 142649849 - 2⁴ = 142649833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142649149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1829 + ... + 16989.

It is an arithmetic number, because the mean of its divisors is an integer number (24024189).

Almost surely, 2^142649849 is an apocalyptic number.

It is an amenable number.

142649849 is a deficient number, since it is larger than the sum of its proper divisors (1495285).

142649849 is an frugal number, since it uses more digits than its factorization.

142649849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15355 (or 15258 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 142649849 is about 11943.6112210671. The cubic root of 142649849 is about 522.5049856441.

The spelling of 142649849 in words is "one hundred forty-two million, six hundred forty-nine thousand, eight hundred forty-nine".