1340440142 has 8 divisors (see below), whose sum is σ = 2059700832. Its totient is φ = 653873200.

The previous prime is 1340440121. The next prime is 1340440151. The reversal of 1340440142 is 2410440431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8173334 + ... + 8173497.

It is an arithmetic number, because the mean of its divisors is an integer number (257462604).

Almost surely, 2^1340440142 is an apocalyptic number.

1340440142 is a deficient number, since it is larger than the sum of its proper divisors (719260690).

1340440142 is a wasteful number, since it uses less digits than its factorization.

1340440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16346874.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1340440142 is about 36612.0218234394. The cubic root of 1340440142 is about 1102.5944659502.

Adding to 1340440142 its reverse (2410440431), we get a palindrome (3750880573).

The spelling of 1340440142 in words is "one billion, three hundred forty million, four hundred forty thousand, one hundred forty-two".