1209151 has 2 divisors, whose sum is σ = 1209152. Its totient is φ = 1209150.

The previous prime is 1209139. The next prime is 1209163. The reversal of 1209151 is 1519021.

It is a balanced prime because it is at equal distance from previous prime (1209139) and next prime (1209163).

It is a cyclic number.

It is not a de Polignac number, because 1209151 - 2¹³ = 1200959 is a prime.

It is a super-2 number, since 2×1209151² = 2924092281602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604575 + 604576.

It is an arithmetic number, because the mean of its divisors is an integer number (604576).

2^1209151 is an apocalyptic number.

1209151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209151 is an equidigital number, since it uses as much as digits as its factorization.

1209151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 1209151 is about 1099.6140231918. The cubic root of 1209151 is about 106.5352950823.

The spelling of 1209151 in words is "one million, two hundred nine thousand, one hundred fifty-one".