1215718042 has 64 divisors (see below), whose sum is σ = 2418833664. Its totient is φ = 443658240.

The previous prime is 1215718037. The next prime is 1215718051. The reversal of 1215718042 is 2408175121.

It is a junction number, because it is equal to n+sod(n) for n = 1215717995 and 1215718013.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608998 + ... + 610990.

It is an arithmetic number, because the mean of its divisors is an integer number (37794276).

Almost surely, 2^1215718042 is an apocalyptic number.

1215718042 is a deficient number, since it is larger than the sum of its proper divisors (1203115622).

1215718042 is a wasteful number, since it uses less digits than its factorization.

1215718042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1215718042 is about 34867.1484638477. The cubic root of 1215718042 is about 1067.2781556125.

The spelling of 1215718042 in words is "one billion, two hundred fifteen million, seven hundred eighteen thousand, forty-two".