1540244 has 12 divisors (see below), whose sum is σ = 2704800. Its totient is φ = 767448.

The previous prime is 1540243. The next prime is 1540249. The reversal of 1540244 is 4420451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (225400).

2^1540244 is an apocalyptic number.

It is an amenable number.

1540244 is a deficient number, since it is larger than the sum of its proper divisors (1164556).

1540244 is a wasteful number, since it uses less digits than its factorization.

1540244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1540244 is about 1241.0656711069. The cubic root of 1540244 is about 115.4861336526.

Adding to 1540244 its reverse (4420451), we get a palindrome (5960695).

The spelling of 1540244 in words is "one million, five hundred forty thousand, two hundred forty-four".