It is a Curzon number.
It is a congruent number.
It is an unprimeable number.
21279950 is an apocalyptic number.
1279950 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 1279950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928448).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1279950 is a wasteful number, since it uses less digits than its factorization.
1279950 is an evil number, because the sum of its binary digits is even.
The square root of 1279950 is about 1131.3487525958. The cubic root of 1279950 is about 108.5752908862.
The spelling of 1279950 in words is "one million, two hundred seventy-nine thousand, nine hundred fifty".