142649419 has 4 divisors (see below), whose sum is σ = 155617560. Its totient is φ = 129681280.

The previous prime is 142649417. The next prime is 142649443. The reversal of 142649419 is 914946241.

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

It is a cyclic number.

It is not a de Polignac number, because 142649419 - 2¹ = 142649417 is a prime.

It is a super-2 number, since 2×142649419² = 40697713482075122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142649411) 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, 6484054 + ... + 6484075.

It is an arithmetic number, because the mean of its divisors is an integer number (38904390).

Almost surely, 2^142649419 is an apocalyptic number.

142649419 is a deficient number, since it is larger than the sum of its proper divisors (12968141).

142649419 is a wasteful number, since it uses less digits than its factorization.

142649419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12968140.

The product of its digits is 62208, while the sum is 40.

The square root of 142649419 is about 11943.5932197978. The cubic root of 142649419 is about 522.5044606351.

The spelling of 142649419 in words is "one hundred forty-two million, six hundred forty-nine thousand, four hundred nineteen".