142564819 has 2 divisors, whose sum is σ = 142564820. Its totient is φ = 142564818.

The previous prime is 142564801. The next prime is 142564843. The reversal of 142564819 is 918465241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142564819 - 2¹⁹ = 142040531 is a prime.

It is a super-2 number, since 2×142564819² = 40649455233005522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142564519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71282409 + 71282410.

It is an arithmetic number, because the mean of its divisors is an integer number (71282410).

Almost surely, 2^142564819 is an apocalyptic number.

142564819 is a deficient number, since it is larger than the sum of its proper divisors (1).

142564819 is an equidigital number, since it uses as much as digits as its factorization.

142564819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 142564819 is about 11940.0510467921. The cubic root of 142564819 is about 522.4011476339.

The spelling of 142564819 in words is "one hundred forty-two million, five hundred sixty-four thousand, eight hundred nineteen".