1226990 has 16 divisors (see below), whose sum is σ = 2285280. Its totient is φ = 473760.

The previous prime is 1226983. The next prime is 1226993. The reversal of 1226990 is 996221.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226993) 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, 1826 + ... + 2405.

It is an arithmetic number, because the mean of its divisors is an integer number (142830).

2^1226990 is an apocalyptic number.

1226990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1226990 is a deficient number, since it is larger than the sum of its proper divisors (1058290).

1226990 is a wasteful number, since it uses less digits than its factorization.

1226990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1226990 is about 1107.6958066184. The cubic root of 1226990 is about 107.0566561689.

Subtracting from 1226990 its sum of digits (29), we obtain a triangular number (1226961 = T₁₅₆₆).

The spelling of 1226990 in words is "one million, two hundred twenty-six thousand, nine hundred ninety".