1215496842 has 96 divisors (see below), whose sum is σ = 3057698880. Its totient is φ = 320060160.

The previous prime is 1215496837. The next prime is 1215496871. The reversal of 1215496842 is 2486945121.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1215496794 and 1215496803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203742 + ... + 209622.

It is an arithmetic number, because the mean of its divisors is an integer number (31851030).

Almost surely, 2^1215496842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215496842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1528849440).

1215496842 is an abundant number, since it is smaller than the sum of its proper divisors (1842202038).

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

1215496842 is a wasteful number, since it uses less digits than its factorization.

1215496842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956 (or 5949 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1215496842 is about 34863.9762792485. The cubic root of 1215496842 is about 1067.2134212361.

The spelling of 1215496842 in words is "one billion, two hundred fifteen million, four hundred ninety-six thousand, eight hundred forty-two".