1213406142 has 24 divisors (see below), whose sum is σ = 2627852184. Its totient is φ = 373355424.

The previous prime is 1213406137. The next prime is 1213406149. The reversal of 1213406142 is 2416043121.

1213406142 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213406149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 597313 + ... + 599340.

It is an arithmetic number, because the mean of its divisors is an integer number (109493841).

Almost surely, 2^1213406142 is an apocalyptic number.

1213406142 is an abundant number, since it is smaller than the sum of its proper divisors (1414446042).

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

1213406142 is a wasteful number, since it uses less digits than its factorization.

1213406142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196684 (or 1196671 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1213406142 is about 34833.9797037318. The cubic root of 1213406142 is about 1066.6011877557.

Adding to 1213406142 its reverse (2416043121), we get a palindrome (3629449263).

The spelling of 1213406142 in words is "one billion, two hundred thirteen million, four hundred six thousand, one hundred forty-two".