1145640 has 32 divisors (see below), whose sum is σ = 3437280. Its totient is φ = 305472.

The previous prime is 1145623. The next prime is 1145659. The reversal of 1145640 is 465411.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4654 + ... + 4893.

It is an arithmetic number, because the mean of its divisors is an integer number (107415).

2^1145640 is an apocalyptic number.

1145640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145640 is an abundant number, since it is smaller than the sum of its proper divisors (2291640).

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

1145640 is a wasteful number, since it uses less digits than its factorization.

1145640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9561 (or 9557 counting only the distinct ones).

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

The square root of 1145640 is about 1070.3457385350. The cubic root of 1145640 is about 104.6363839710.

The spelling of 1145640 in words is "one million, one hundred forty-five thousand, six hundred forty".