1213713140 has 24 divisors (see below), whose sum is σ = 2567407752. Its totient is φ = 481940480.

The previous prime is 1213713073. The next prime is 1213713143. The reversal of 1213713140 is 413173121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26896 + 1213686244 = 164^2 + 34838^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213713143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218741 + ... + 224220.

It is an arithmetic number, because the mean of its divisors is an integer number (106975323).

Almost surely, 2^1213713140 is an apocalyptic number.

1213713140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213713140 is an abundant number, since it is smaller than the sum of its proper divisors (1353694612).

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

1213713140 is a wasteful number, since it uses less digits than its factorization.

1213713140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443107 (or 443105 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1213713140 is about 34838.3860131321. The cubic root of 1213713140 is about 1066.6911320343.

Adding to 1213713140 its reverse (413173121), we get a palindrome (1626886261).

The spelling of 1213713140 in words is "one billion, two hundred thirteen million, seven hundred thirteen thousand, one hundred forty".