1215135424 has 56 divisors (see below), whose sum is σ = 2546705600. Its totient is φ = 573661440.

The previous prime is 1215135407. The next prime is 1215135431. The reversal of 1215135424 is 4245315121.

It is a junction number, because it is equal to n+sod(n) for n = 1215135392 and 1215135401.

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, 400987 + ... + 404005.

Almost surely, 2^1215135424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215135424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273352800).

1215135424 is an abundant number, since it is smaller than the sum of its proper divisors (1331570176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215135424 is a wasteful number, since it uses less digits than its factorization.

1215135424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3371 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1215135424 is about 34858.7926354313. The cubic root of 1215135424 is about 1067.1076350362.

The spelling of 1215135424 in words is "one billion, two hundred fifteen million, one hundred thirty-five thousand, four hundred twenty-four".