1285182142 has 4 divisors (see below), whose sum is σ = 1927773216. Its totient is φ = 642591070.

The previous prime is 1285182137. The next prime is 1285182193. The reversal of 1285182142 is 2412815821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2412815821 = 13 ⋅185601217.

It is a junction number, because it is equal to n+sod(n) for n = 1285182098 and 1285182107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321295534 + ... + 321295537.

It is an arithmetic number, because the mean of its divisors is an integer number (481943304).

Almost surely, 2^1285182142 is an apocalyptic number.

1285182142 is a deficient number, since it is larger than the sum of its proper divisors (642591074).

1285182142 is an equidigital number, since it uses as much as digits as its factorization.

1285182142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642591073.

The product of its digits is 10240, while the sum is 34.

The square root of 1285182142 is about 35849.4371224989. The cubic root of 1285182142 is about 1087.2303338413.

Adding to 1285182142 its reverse (2412815821), we get a palindrome (3697997963).

The spelling of 1285182142 in words is "one billion, two hundred eighty-five million, one hundred eighty-two thousand, one hundred forty-two".