1215242 has 16 divisors (see below), whose sum is σ = 2118912. Its totient is φ = 511920.

The previous prime is 1215239. The next prime is 1215271. The reversal of 1215242 is 2425121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215242.

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, 143 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (132432).

2^1215242 is an apocalyptic number.

1215242 is a deficient number, since it is larger than the sum of its proper divisors (903670).

1215242 is a wasteful number, since it uses less digits than its factorization.

1215242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493.

The product of its digits is 160, while the sum is 17.

The square root of 1215242 is about 1102.3801522161. The cubic root of 1215242 is about 106.7138831762.

The spelling of 1215242 in words is "one million, two hundred fifteen thousand, two hundred forty-two".