142990849 has 4 divisors (see below), whose sum is σ = 143083440. Its totient is φ = 142898260.

The previous prime is 142990787. The next prime is 142990877. The reversal of 142990849 is 948099241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142990849 - 2¹⁷ = 142859777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142990799 and 142990808.

It is not an unprimeable number, because it can be changed into a prime (142997849) 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, 43939 + ... + 47080.

It is an arithmetic number, because the mean of its divisors is an integer number (35770860).

Almost surely, 2^142990849 is an apocalyptic number.

It is an amenable number.

142990849 is a deficient number, since it is larger than the sum of its proper divisors (92591).

142990849 is an equidigital number, since it uses as much as digits as its factorization.

142990849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92590.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 142990849 is about 11957.8781144482. The cubic root of 142990849 is about 522.9209982707.

The spelling of 142990849 in words is "one hundred forty-two million, nine hundred ninety thousand, eight hundred forty-nine".