1266550 has 24 divisors (see below), whose sum is σ = 2394936. Its totient is φ = 498240.

The previous prime is 1266539. The next prime is 1266557. The reversal of 1266550 is 556621.

1266550 = T₁₄₅ + T₁₄₆ + ... + T₂₁₉.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3477 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (99789).

2^1266550 is an apocalyptic number.

1266550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1266550 is a deficient number, since it is larger than the sum of its proper divisors (1128386).

1266550 is a wasteful number, since it uses less digits than its factorization.

1266550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1266550 is about 1125.4110360220. The cubic root of 1266550 is about 108.1950635701.

The spelling of 1266550 in words is "one million, two hundred sixty-six thousand, five hundred fifty".