1215032242 has 4 divisors (see below), whose sum is σ = 1822548366. Its totient is φ = 607516120.
The previous prime is 1215032239. The next prime is 1215032267. The reversal of 1215032242 is 2422305121.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2422305121 = 59 ⋅41056019.
It can be written as a sum of positive squares in only one way, i.e., 1065434881 + 149597361 = 32641^2 + 12231^2 .
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303758059 + ... + 303758062.
Almost surely, 21215032242 is an apocalyptic number.
1215032242 is a deficient number, since it is larger than the sum of its proper divisors (607516124).
1215032242 is an equidigital number, since it uses as much as digits as its factorization.
1215032242 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 607516123.
The product of its (nonzero) digits is 960, while the sum is 22.
The square root of 1215032242 is about 34857.3126043876. The cubic root of 1215032242 is about 1067.0774300581.
Adding to 1215032242 its reverse (2422305121), we get a palindrome (3637337363).
The spelling of 1215032242 in words is "one billion, two hundred fifteen million, thirty-two thousand, two hundred forty-two".
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