1226291 has 16 divisors (see below), whose sum is σ = 1444608. Its totient is φ = 1029600.

The previous prime is 1226263. The next prime is 1226293. The reversal of 1226291 is 1926221.

1226291 = T₆₆ + T₆₇ + ... + T₁₉₆.

It is a de Polignac number, because none of the positive numbers 2^k-1226291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1226293) 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 15 ways as a sum of consecutive naturals, for example, 9296 + ... + 9426.

It is an arithmetic number, because the mean of its divisors is an integer number (90288).

2^1226291 is an apocalyptic number.

1226291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1226291 is a deficient number, since it is larger than the sum of its proper divisors (218317).

1226291 is a wasteful number, since it uses less digits than its factorization.

1226291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202.

The product of its digits is 432, while the sum is 23.

The square root of 1226291 is about 1107.3802418320. The cubic root of 1226291 is about 107.0363227194.

The spelling of 1226291 in words is "one million, two hundred twenty-six thousand, two hundred ninety-one".