1340140212 has 18 divisors (see below), whose sum is σ = 3387576738. Its totient is φ = 446713392.

The previous prime is 1340140211. The next prime is 1340140213. The reversal of 1340140212 is 2120410431.

1340140212 is a `hidden beast` number, since 13 + 401 + 40 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (1340140211) and next prime (1340140213).

It can be written as a sum of positive squares in only one way, i.e., 1274918436 + 65221776 = 35706^2 + 8076^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340140211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18613023 + ... + 18613094.

Almost surely, 2^1340140212 is an apocalyptic number.

1340140212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1340140212 is an abundant number, since it is smaller than the sum of its proper divisors (2047436526).

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

1340140212 is a wasteful number, since it uses less digits than its factorization.

1340140212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37226127 (or 37226122 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1340140212 is about 36607.9255353264. The cubic root of 1340140212 is about 1102.5122228580.

Adding to 1340140212 its reverse (2120410431), we get a palindrome (3460550643).

The spelling of 1340140212 in words is "one billion, three hundred forty million, one hundred forty thousand, two hundred twelve".