1266140 has 48 divisors (see below), whose sum is σ = 2872800. Its totient is φ = 467712.

The previous prime is 1266113. The next prime is 1266149. The reversal of 1266140 is 416621.

It is a happy number.

It is a super-2 number, since 2×1266140² = 3206220999200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266149) by changing a digit.

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, 21431 + ... + 21489.

It is an arithmetic number, because the mean of its divisors is an integer number (59850).

2^1266140 is an apocalyptic number.

1266140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436400).

1266140 is an abundant number, since it is smaller than the sum of its proper divisors (1606660).

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

1266140 is a wasteful number, since it uses less digits than its factorization.

1266140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1266140 is about 1125.2288656091. The cubic root of 1266140 is about 108.1833875569.

The spelling of 1266140 in words is "one million, two hundred sixty-six thousand, one hundred forty".