1340213481 has 6 divisors (see below), whose sum is σ = 1935863930. Its totient is φ = 893475648.

The previous prime is 1340213419. The next prime is 1340213549. The reversal of 1340213481 is 1843120431.

It can be written as a sum of positive squares in only one way, i.e., 1079713881 + 260499600 = 32859^2 + 16140^2 .

It is not a de Polignac number, because 1340213481 - 2⁶ = 1340213417 is a prime.

It is a super-2 number, since 2×1340213481² = 3592344349308274722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1340613481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74456296 + ... + 74456313.

Almost surely, 2^1340213481 is an apocalyptic number.

It is an amenable number.

1340213481 is a deficient number, since it is larger than the sum of its proper divisors (595650449).

1340213481 is a wasteful number, since it uses less digits than its factorization.

1340213481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148912615 (or 148912612 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1340213481 is about 36608.9262475697. The cubic root of 1340213481 is about 1102.5323149089.

The spelling of 1340213481 in words is "one billion, three hundred forty million, two hundred thirteen thousand, four hundred eighty-one".