291226 has 16 divisors (see below), whose sum is σ = 491904. Its totient is φ = 128304.

The previous prime is 291217. The next prime is 291253. The reversal of 291226 is 622192.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 291197 and 291206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355 + ... + 841.

It is an arithmetic number, because the mean of its divisors is an integer number (30744).

2²⁹¹²²⁶ is an apocalyptic number.

291226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

291226 is a deficient number, since it is larger than the sum of its proper divisors (200678).

291226 is a wasteful number, since it uses less digits than its factorization.

291226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525.

The product of its digits is 432, while the sum is 22.

The square root of 291226 is about 539.6535925944. The cubic root of 291226 is about 66.2842044805.

The spelling of 291226 in words is "two hundred ninety-one thousand, two hundred twenty-six".