1187440 has 20 divisors (see below), whose sum is σ = 2760984. Its totient is φ = 474944.

The previous prime is 1187429. The next prime is 1187453. The reversal of 1187440 is 447811.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7342 + ... + 7501.

2^1187440 is an apocalyptic number.

1187440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1187440 is an abundant number, since it is smaller than the sum of its proper divisors (1573544).

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

1187440 is a wasteful number, since it uses less digits than its factorization.

1187440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14856 (or 14850 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 1187440 is about 1089.6972056493. The cubic root of 1187440 is about 105.8938060717.

The spelling of 1187440 in words is "one million, one hundred eighty-seven thousand, four hundred forty".