1145440 has 24 divisors (see below), whose sum is σ = 2706480. Its totient is φ = 458112.

The previous prime is 1145429. The next prime is 1145461. The reversal of 1145440 is 445411.

1145440 = 101² + 102² + ... + 164².

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, 3420 + ... + 3739.

It is an arithmetic number, because the mean of its divisors is an integer number (112770).

2^1145440 is an apocalyptic number.

1145440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145440 is an abundant number, since it is smaller than the sum of its proper divisors (1561040).

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

1145440 is an equidigital number, since it uses as much as digits as its factorization.

1145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174 (or 7166 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1145440 is about 1070.2523067016. The cubic root of 1145440 is about 104.6302946542.

It can be divided in two parts, 11 and 45440, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 1145440 in words is "one million, one hundred forty-five thousand, four hundred forty".