1026540 has 48 divisors (see below), whose sum is σ = 3195360. Its totient is φ = 273600.

The previous prime is 1026521. The next prime is 1026547. The reversal of 1026540 is 456201.

It is a happy number.

1026540 is a `hidden beast` number, since 10 + 2 + 654 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1026547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411 + ... + 1490.

It is an arithmetic number, because the mean of its divisors is an integer number (66570).

2^1026540 is an apocalyptic number.

1026540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1026540 is an abundant number, since it is smaller than the sum of its proper divisors (2168820).

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

1026540 is a wasteful number, since it uses less digits than its factorization.

1026540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1026540 is about 1013.1831028990. The cubic root of 1026540 is about 100.8769537080.

The spelling of 1026540 in words is "one million, twenty-six thousand, five hundred forty".