1269990 has 48 divisors (see below), whose sum is σ = 3358368. Its totient is φ = 332928.

The previous prime is 1269971. The next prime is 1270001. The reversal of 1269990 is 999621.

It is a super-2 number, since 2×1269990² = 3225749200200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9202 + ... + 9338.

It is an arithmetic number, because the mean of its divisors is an integer number (69966).

2^1269990 is an apocalyptic number.

1269990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1269990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679184).

1269990 is an abundant number, since it is smaller than the sum of its proper divisors (2088378).

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

1269990 is a wasteful number, since it uses less digits than its factorization.

1269990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1269990 is about 1126.9383301672. The cubic root of 1269990 is about 108.2929290483.

The spelling of 1269990 in words is "one million, two hundred sixty-nine thousand, nine hundred ninety".