1154640 has 80 divisors (see below), whose sum is σ = 3803328. Its totient is φ = 288768.

The previous prime is 1154639. The next prime is 1154651. The reversal of 1154640 is 464511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3939 + ... + 4221.

2^1154640 is an apocalyptic number.

1154640 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 1154640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1901664).

1154640 is an abundant number, since it is smaller than the sum of its proper divisors (2648688).

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

1154640 is a wasteful number, since it uses less digits than its factorization.

1154640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1154640 is about 1074.5417627994. The cubic root of 1154640 is about 104.9096728845.

The spelling of 1154640 in words is "one million, one hundred fifty-four thousand, six hundred forty".