1535240 has 32 divisors (see below), whose sum is σ = 3948480. Its totient is φ = 526272.

The previous prime is 1535179. The next prime is 1535243. The reversal of 1535240 is 425351.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1535243) 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, 2462 + ... + 3021.

It is an arithmetic number, because the mean of its divisors is an integer number (123390).

2^1535240 is an apocalyptic number.

1535240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1535240 is an abundant number, since it is smaller than the sum of its proper divisors (2413240).

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

1535240 is a wasteful number, since it uses less digits than its factorization.

1535240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501 (or 5497 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1535240 is about 1239.0480216682. The cubic root of 1535240 is about 115.3609328033.

The spelling of 1535240 in words is "one million, five hundred thirty-five thousand, two hundred forty".