1266990 has 32 divisors (see below), whose sum is σ = 3071520. Its totient is φ = 334464.

The previous prime is 1266953. The next prime is 1267009. The reversal of 1266990 is 996621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 4576 + ... + 4844.

It is an arithmetic number, because the mean of its divisors is an integer number (95985).

2^1266990 is an apocalyptic number.

1266990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266990 is an abundant number, since it is smaller than the sum of its proper divisors (1804530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266990 is a wasteful number, since it uses less digits than its factorization.

1266990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1266990 is about 1125.6065031795. The cubic root of 1266990 is about 108.2075911229.

The spelling of 1266990 in words is "one million, two hundred sixty-six thousand, nine hundred ninety".