1503240 has 32 divisors (see below), whose sum is σ = 4510080. Its totient is φ = 400832.

The previous prime is 1503233. The next prime is 1503241. The reversal of 1503240 is 423051.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1503241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6144 + ... + 6383.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^1503240 is an apocalyptic number.

1503240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1503240 is an abundant number, since it is smaller than the sum of its proper divisors (3006840).

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

1503240 is a wasteful number, since it uses less digits than its factorization.

1503240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12541 (or 12537 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1503240 is about 1226.0668823519. The cubic root of 1503240 is about 114.5537844099.

Adding to 1503240 its reverse (423051), we get a palindrome (1926291).

The spelling of 1503240 in words is "one million, five hundred three thousand, two hundred forty".