1340144531 has 8 divisors (see below), whose sum is σ = 1477048944. Its totient is φ = 1205752320.

The previous prime is 1340144521. The next prime is 1340144557. The reversal of 1340144531 is 1354410431.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340144531 is a prime.

It is a super-2 number, since 2×1340144531² = 3591974727938419922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340144531.

It is not an unprimeable number, because it can be changed into a prime (1340144521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626930 + ... + 629063.

It is an arithmetic number, because the mean of its divisors is an integer number (184631118).

Almost surely, 2^1340144531 is an apocalyptic number.

1340144531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1340144531 is a deficient number, since it is larger than the sum of its proper divisors (136904413).

1340144531 is a wasteful number, since it uses less digits than its factorization.

1340144531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256101.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1340144531 is about 36607.9845252371. The cubic root of 1340144531 is about 1102.5134072478.

Adding to 1340144531 its reverse (1354410431), we get a palindrome (2694554962).

The spelling of 1340144531 in words is "one billion, three hundred forty million, one hundred forty-four thousand, five hundred thirty-one".