142651049 has 4 divisors (see below), whose sum is σ = 143375364. Its totient is φ = 141926736.

The previous prime is 142651043. The next prime is 142651073. The reversal of 142651049 is 940156241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940156241 = 53 ⋅17738797.

It can be written as a sum of positive squares in 2 ways, for example, as 132411049 + 10240000 = 11507^2 + 3200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142651049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142651043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361862 + ... + 362255.

It is an arithmetic number, because the mean of its divisors is an integer number (35843841).

Almost surely, 2^142651049 is an apocalyptic number.

It is an amenable number.

142651049 is a deficient number, since it is larger than the sum of its proper divisors (724315).

142651049 is an equidigital number, since it uses as much as digits as its factorization.

142651049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724314.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 142651049 is about 11943.6614570240. The cubic root of 142651049 is about 522.5064507800.

The spelling of 142651049 in words is "one hundred forty-two million, six hundred fifty-one thousand, forty-nine".