1282142640 has 80 divisors (see below), whose sum is σ = 4102880256. Its totient is φ = 330873600.

The previous prime is 1282142627. The next prime is 1282142651. The reversal of 1282142640 is 462412821.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1282142598 and 1282142607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78726 + ... + 93605.

Almost surely, 2^1282142640 is an apocalyptic number.

1282142640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1282142640 is an abundant number, since it is smaller than the sum of its proper divisors (2820737616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1282142640 is a wasteful number, since it uses less digits than its factorization.

1282142640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172378 (or 172372 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 1282142640 is about 35807.0194235711. The cubic root of 1282142640 is about 1086.3725443003.

The spelling of 1282142640 in words is "one billion, two hundred eighty-two million, one hundred forty-two thousand, six hundred forty".