1042142819 has 4 divisors (see below), whose sum is σ = 1042701096. Its totient is φ = 1041584544.

The previous prime is 1042142813. The next prime is 1042142863. The reversal of 1042142819 is 9182412401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1042142819 - 2¹² = 1042138723 is a prime.

It is a super-2 number, since 2×1042142819² = 2172123310386533522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042142813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276329 + ... + 280074.

It is an arithmetic number, because the mean of its divisors is an integer number (260675274).

Almost surely, 2^1042142819 is an apocalyptic number.

1042142819 is a deficient number, since it is larger than the sum of its proper divisors (558277).

1042142819 is an equidigital number, since it uses as much as digits as its factorization.

1042142819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558276.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1042142819 is about 32282.2368958534. The cubic root of 1042142819 is about 1013.8547653164.

The spelling of 1042142819 in words is "one billion, forty-two million, one hundred forty-two thousand, eight hundred nineteen".