142049819 has 2 divisors, whose sum is σ = 142049820. Its totient is φ = 142049818.

The previous prime is 142049783. The next prime is 142049837. The reversal of 142049819 is 918940241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142049819 is a prime.

It is a super-2 number, since 2×142049819² = 40356302155865522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142049879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71024909 + 71024910.

It is an arithmetic number, because the mean of its divisors is an integer number (71024910).

Almost surely, 2^142049819 is an apocalyptic number.

142049819 is a deficient number, since it is larger than the sum of its proper divisors (1).

142049819 is an equidigital number, since it uses as much as digits as its factorization.

142049819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 142049819 is about 11918.4654633052. The cubic root of 142049819 is about 521.7713494368.

The spelling of 142049819 in words is "one hundred forty-two million, forty-nine thousand, eight hundred nineteen".