1340021412 has 36 divisors (see below), whose sum is σ = 3392298000. Its totient is φ = 446011632.

The previous prime is 1340021381. The next prime is 1340021467. The reversal of 1340021412 is 2141200431.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2662 + ... + 51837.

It is an arithmetic number, because the mean of its divisors is an integer number (94230500).

Almost surely, 2^1340021412 is an apocalyptic number.

1340021412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1340021412 is an abundant number, since it is smaller than the sum of its proper divisors (2052276588).

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

1340021412 is a wasteful number, since it uses less digits than its factorization.

1340021412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55192 (or 55187 counting only the distinct ones).

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

The square root of 1340021412 is about 36606.3028999106. The cubic root of 1340021412 is about 1102.4796435996.

Adding to 1340021412 its reverse (2141200431), we get a palindrome (3481221843).

The spelling of 1340021412 in words is "one billion, three hundred forty million, twenty-one thousand, four hundred twelve".