1213042142 has 16 divisors (see below), whose sum is σ = 1965803280. Its totient is φ = 558073152.

The previous prime is 1213042093. The next prime is 1213042153. The reversal of 1213042142 is 2412403121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66392 + ... + 82667.

It is an arithmetic number, because the mean of its divisors is an integer number (122862705).

Almost surely, 2^1213042142 is an apocalyptic number.

1213042142 is a deficient number, since it is larger than the sum of its proper divisors (752761138).

1213042142 is a wasteful number, since it uses less digits than its factorization.

1213042142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149387.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1213042142 is about 34828.7545284066. The cubic root of 1213042142 is about 1066.4945233704.

Adding to 1213042142 its reverse (2412403121), we get a palindrome (3625445263).

The spelling of 1213042142 in words is "one billion, two hundred thirteen million, forty-two thousand, one hundred forty-two".