1226290 has 16 divisors (see below), whose sum is σ = 2377368. Its totient is φ = 452736.

The previous prime is 1226263. The next prime is 1226293. The reversal of 1226290 is 926221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 881721 + 344569 = 939^2 + 587^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4587 + ... + 4846.

2^1226290 is an apocalyptic number.

1226290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1226290 is a deficient number, since it is larger than the sum of its proper divisors (1151078).

1226290 is a wasteful number, since it uses less digits than its factorization.

1226290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9453.

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

The square root of 1226290 is about 1107.3797903159. The cubic root of 1226290 is about 107.0362936245.

The spelling of 1226290 in words is "one million, two hundred twenty-six thousand, two hundred ninety".