142855619 has 2 divisors, whose sum is σ = 142855620. Its totient is φ = 142855618.

The previous prime is 142855613. The next prime is 142855633. The reversal of 142855619 is 916558241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142855619 - 2¹² = 142851523 is a prime.

It is a super-2 number, since 2×142855619² = 40815455759746322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142855613) 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, 71427809 + 71427810.

It is an arithmetic number, because the mean of its divisors is an integer number (71427810).

Almost surely, 2^142855619 is an apocalyptic number.

142855619 is a deficient number, since it is larger than the sum of its proper divisors (1).

142855619 is an equidigital number, since it uses as much as digits as its factorization.

142855619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 142855619 is about 11952.2223456561. Note that the first 3 decimals coincide. The cubic root of 142855619 is about 522.7560998151.

The spelling of 142855619 in words is "one hundred forty-two million, eight hundred fifty-five thousand, six hundred nineteen".