1223151 has 4 divisors (see below), whose sum is σ = 1630872. Its totient is φ = 815432.

The previous prime is 1223149. The next prime is 1223161. The reversal of 1223151 is 1513221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223151 - 2¹ = 1223149 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223161) 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 in 3 ways as a sum of consecutive naturals, for example, 203856 + ... + 203861.

It is an arithmetic number, because the mean of its divisors is an integer number (407718).

2^1223151 is an apocalyptic number.

1223151 is a deficient number, since it is larger than the sum of its proper divisors (407721).

1223151 is an equidigital number, since it uses as much as digits as its factorization.

1223151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407720.

The product of its digits is 60, while the sum is 15.

The square root of 1223151 is about 1105.9615725693. The cubic root of 1223151 is about 106.9448867482.

Adding to 1223151 its reverse (1513221), we get a palindrome (2736372).

The spelling of 1223151 in words is "one million, two hundred twenty-three thousand, one hundred fifty-one".