1215042 has 16 divisors (see below), whose sum is σ = 2514240. Its totient is φ = 390992.

The previous prime is 1215029. The next prime is 1215047. The reversal of 1215042 is 2405121.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1215047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3318 + ... + 3665.

It is an arithmetic number, because the mean of its divisors is an integer number (157140).

2^1215042 is an apocalyptic number.

1215042 is an abundant number, since it is smaller than the sum of its proper divisors (1299198).

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

1215042 is a wasteful number, since it uses less digits than its factorization.

1215042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7017.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1215042 is about 1102.2894356747. The cubic root of 1215042 is about 106.7080286639.

The spelling of 1215042 in words is "one million, two hundred fifteen thousand, forty-two".