1213532042 has 4 divisors (see below), whose sum is σ = 1820298066. Its totient is φ = 606766020.

The previous prime is 1213532041. The next prime is 1213532051. The reversal of 1213532042 is 2402353121.

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., 1207632001 + 5900041 = 34751^2 + 2429^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213531999 and 1213532017.

It is not an unprimeable number, because it can be changed into a prime (1213532041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303383009 + ... + 303383012.

Almost surely, 2^1213532042 is an apocalyptic number.

1213532042 is a deficient number, since it is larger than the sum of its proper divisors (606766024).

1213532042 is an equidigital number, since it uses as much as digits as its factorization.

1213532042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606766023.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1213532042 is about 34835.7868003580. The cubic root of 1213532042 is about 1066.6380757745.

Adding to 1213532042 its reverse (2402353121), we get a palindrome (3615885163).

The spelling of 1213532042 in words is "one billion, two hundred thirteen million, five hundred thirty-two thousand, forty-two".