1215207 has 12 divisors (see below), whose sum is σ = 2006160. Its totient is φ = 694368.

The previous prime is 1215197. The next prime is 1215209. The reversal of 1215207 is 7025121.

It is not a de Polignac number, because 1215207 - 2⁷ = 1215079 is a prime.

1215207 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215209) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9582 + ... + 9707.

It is an arithmetic number, because the mean of its divisors is an integer number (167180).

2^1215207 is an apocalyptic number.

1215207 is a deficient number, since it is larger than the sum of its proper divisors (790953).

1215207 is a wasteful number, since it uses less digits than its factorization.

1215207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19302 (or 19299 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 1215207 is about 1102.3642773603. The cubic root of 1215207 is about 106.7128586829.

The spelling of 1215207 in words is "one million, two hundred fifteen thousand, two hundred seven".