142947819 has 24 divisors (see below), whose sum is σ = 236301312. Its totient is φ = 81572400.

The previous prime is 142947817. The next prime is 142947839. The reversal of 142947819 is 918749241.

It is a happy number.

142947819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142947819 - 2¹ = 142947817 is a prime.

It is a super-2 number, since 2×142947819² = 40868157913713522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142947817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72294 + ... + 74244.

It is an arithmetic number, because the mean of its divisors is an integer number (9845888).

Almost surely, 2^142947819 is an apocalyptic number.

142947819 is a deficient number, since it is larger than the sum of its proper divisors (93353493).

142947819 is a wasteful number, since it uses less digits than its factorization.

142947819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127 (or 3124 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 142947819 is about 11956.0787468133. The cubic root of 142947819 is about 522.8685390907.

The spelling of 142947819 in words is "one hundred forty-two million, nine hundred forty-seven thousand, eight hundred nineteen".