1262640 has 40 divisors (see below), whose sum is σ = 3914928. Its totient is φ = 336640.

The previous prime is 1262633. The next prime is 1262669. The reversal of 1262640 is 462621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2391 + ... + 2870.

2^1262640 is an apocalyptic number.

1262640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1262640 is an abundant number, since it is smaller than the sum of its proper divisors (2652288).

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

1262640 is a wasteful number, since it uses less digits than its factorization.

1262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277 (or 5271 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1262640 is about 1123.6725501675. The cubic root of 1262640 is about 108.0836115217.

The spelling of 1262640 in words is "one million, two hundred sixty-two thousand, six hundred forty".