1215151 has 6 divisors (see below), whose sum is σ = 1413600. Its totient is φ = 1041516.

The previous prime is 1215133. The next prime is 1215157. The reversal of 1215151 is 1515121.

It is not a de Polignac number, because 1215151 - 2⁹ = 1214639 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215157) 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 5 ways as a sum of consecutive naturals, for example, 12351 + ... + 12448.

It is an arithmetic number, because the mean of its divisors is an integer number (235600).

2^1215151 is an apocalyptic number.

1215151 is a deficient number, since it is larger than the sum of its proper divisors (198449).

1215151 is an equidigital number, since it uses as much as digits as its factorization.

1215151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24813 (or 24806 counting only the distinct ones).

The product of its digits is 50, while the sum is 16.

The square root of 1215151 is about 1102.3388771154. The cubic root of 1215151 is about 106.7112194527.

The spelling of 1215151 in words is "one million, two hundred fifteen thousand, one hundred fifty-one".