1005542 has 4 divisors (see below), whose sum is σ = 1508316. Its totient is φ = 502770.

The previous prime is 1005541. The next prime is 1005551. The reversal of 1005542 is 2455001.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1005542² = 2022229427528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1005542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251384 + ... + 251387.

It is an arithmetic number, because the mean of its divisors is an integer number (377079).

2^1005542 is an apocalyptic number.

1005542 is a deficient number, since it is larger than the sum of its proper divisors (502774).

1005542 is an equidigital number, since it uses as much as digits as its factorization.

1005542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502773.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1005542 is about 1002.7671713813. The cubic root of 1005542 is about 100.1843931161.

The spelling of 1005542 in words is "one million, five thousand, five hundred forty-two".