1215173134 has 16 divisors (see below), whose sum is σ = 2090521728. Its totient is φ = 518946552.

The previous prime is 1215173083. The next prime is 1215173143. The reversal of 1215173134 is 4313715121.

It is a congruent number.

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, 149392 + ... + 157315.

It is an arithmetic number, because the mean of its divisors is an integer number (130657608).

Almost surely, 2^1215173134 is an apocalyptic number.

1215173134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1215173134 is a deficient number, since it is larger than the sum of its proper divisors (875348594).

1215173134 is a wasteful number, since it uses less digits than its factorization.

1215173134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306999.

The product of its digits is 2520, while the sum is 28.

The square root of 1215173134 is about 34859.3335277656. Note that the first 3 decimals coincide. The cubic root of 1215173134 is about 1067.1186736447.

Adding to 1215173134 its reverse (4313715121), we get a palindrome (5528888255).

The spelling of 1215173134 in words is "one billion, two hundred fifteen million, one hundred seventy-three thousand, one hundred thirty-four".