1142387456 has 72 divisors (see below), whose sum is σ = 2622729984. Its totient is φ = 486466560.

The previous prime is 1142387429. The next prime is 1142387461. The reversal of 1142387456 is 6547832411.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290141 + ... + 294051.

Almost surely, 2^1142387456 is an apocalyptic number.

1142387456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142387456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1311364992).

1142387456 is an abundant number, since it is smaller than the sum of its proper divisors (1480342528).

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

1142387456 is an equidigital number, since it uses as much as digits as its factorization.

1142387456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097 (or 4083 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 1142387456 is about 33799.2227129560. Note that the first 3 decimals coincide. The cubic root of 1142387456 is about 1045.3726702074.

The spelling of 1142387456 in words is "one billion, one hundred forty-two million, three hundred eighty-seven thousand, four hundred fifty-six".