1267440 has 40 divisors (see below), whose sum is σ = 3929808. Its totient is φ = 337920.

The previous prime is 1267429. The next prime is 1267447. The reversal of 1267440 is 447621.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1267440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267447) 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 7 ways as a sum of consecutive naturals, for example, 2401 + ... + 2880.

2^1267440 is an apocalyptic number.

1267440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1267440 is an abundant number, since it is smaller than the sum of its proper divisors (2662368).

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

1267440 is a wasteful number, since it uses less digits than its factorization.

1267440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297 (or 5291 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1267440 is about 1125.8063776689. The cubic root of 1267440 is about 108.2204003933.

The spelling of 1267440 in words is "one million, two hundred sixty-seven thousand, four hundred forty".