1215042150442 has 4 divisors (see below), whose sum is σ = 1822563225666. Its totient is φ = 607521075220.

The previous prime is 1215042150349. The next prime is 1215042150457. The reversal of 1215042150442 is 2440512405121.

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., 964813098001 + 250229052441 = 982249^2 + 500229^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303760537609 + ... + 303760537612.

Almost surely, 2^{1215042150442} is an apocalyptic number.

1215042150442 is a deficient number, since it is larger than the sum of its proper divisors (607521075224).

1215042150442 is an equidigital number, since it uses as much as digits as its factorization.

1215042150442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607521075223.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 1215042150442 its reverse (2440512405121), we get a palindrome (3655554555563).

The spelling of 1215042150442 in words is "one trillion, two hundred fifteen billion, forty-two million, one hundred fifty thousand, four hundred forty-two".