1026538 has 4 divisors (see below), whose sum is σ = 1539810. Its totient is φ = 513268.

The previous prime is 1026521. The next prime is 1026547. The reversal of 1026538 is 8356201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8356201 = 7 ⋅1193743.

It can be written as a sum of positive squares in only one way, i.e., 613089 + 413449 = 783^2 + 643^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 256633 + ... + 256636.

2^1026538 is an apocalyptic number.

1026538 is a deficient number, since it is larger than the sum of its proper divisors (513272).

1026538 is an equidigital number, since it uses as much as digits as its factorization.

1026538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513271.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1026538 is about 1013.1821159101. The cubic root of 1026538 is about 100.8768881953.

The spelling of 1026538 in words is "one million, twenty-six thousand, five hundred thirty-eight".