2145744 has 40 divisors (see below), whose sum is σ = 6160320. Its totient is φ = 715104.

The previous prime is 2145721. The next prime is 2145763. The reversal of 2145744 is 4475412.

2145744 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 2052 + ... + 2915.

It is an arithmetic number, because the mean of its divisors is an integer number (154008).

2^2145744 is an apocalyptic number.

2145744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2145744 is an abundant number, since it is smaller than the sum of its proper divisors (4014576).

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

2145744 is a wasteful number, since it uses less digits than its factorization.

2145744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984 (or 4972 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 2145744 is about 1464.8358269786. The cubic root of 2145744 is about 128.9810680708.

The spelling of 2145744 in words is "two million, one hundred forty-five thousand, seven hundred forty-four".