1215142042 has 16 divisors (see below), whose sum is σ = 1864881792. Its totient is φ = 593561920.

The previous prime is 1215142039. The next prime is 1215142057. The reversal of 1215142042 is 2402415121.

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, 41442 + ... + 64402.

It is an arithmetic number, because the mean of its divisors is an integer number (116555112).

Almost surely, 2^1215142042 is an apocalyptic number.

1215142042 is a deficient number, since it is larger than the sum of its proper divisors (649739750).

1215142042 is a wasteful number, since it uses less digits than its factorization.

1215142042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23573.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1215142042 is about 34858.8875611371. The cubic root of 1215142042 is about 1067.1095722978.

Adding to 1215142042 its reverse (2402415121), we get a palindrome (3617557163).

The spelling of 1215142042 in words is "one billion, two hundred fifteen million, one hundred forty-two thousand, forty-two".