1213013042 has 4 divisors (see below), whose sum is σ = 1819519566. Its totient is φ = 606506520.

The previous prime is 1213012979. The next prime is 1213013059. The reversal of 1213013042 is 2403103121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1060218721 + 152794321 = 32561^2 + 12361^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1213013042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303253259 + ... + 303253262.

Almost surely, 2^1213013042 is an apocalyptic number.

1213013042 is a deficient number, since it is larger than the sum of its proper divisors (606506524).

1213013042 is an equidigital number, since it uses as much as digits as its factorization.

1213013042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606506523.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1213013042 is about 34828.3367676379. The cubic root of 1213013042 is about 1066.4859951592.

Adding to 1213013042 its reverse (2403103121), we get a palindrome (3616116163).

The spelling of 1213013042 in words is "one billion, two hundred thirteen million, thirteen thousand, forty-two".