1240280 has 32 divisors (see below), whose sum is σ = 2827440. Its totient is φ = 489600.

The previous prime is 1240273. The next prime is 1240307. The reversal of 1240280 is 820421.

It is a congruent number.

It is an unprimeable number.

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, 3887 + ... + 4193.

2^1240280 is an apocalyptic number.

1240280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240280 is an abundant number, since it is smaller than the sum of its proper divisors (1587160).

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

1240280 is a wasteful number, since it uses less digits than its factorization.

1240280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1240280 is about 1113.6785891809. The cubic root of 1240280 is about 107.4417928984.

The spelling of 1240280 in words is "one million, two hundred forty thousand, two hundred eighty".