1243542 has 8 divisors (see below), whose sum is σ = 2487096. Its totient is φ = 414512.

The previous prime is 1243537. The next prime is 1243547. The reversal of 1243542 is 2453421.

It is an interprime number because it is at equal distance from previous prime (1243537) and next prime (1243547).

It is a sphenic number, since it is the product of 3 distinct primes.

1243542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103623 + ... + 103634.

It is an arithmetic number, because the mean of its divisors is an integer number (310887).

2^1243542 is an apocalyptic number.

1243542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1243542 is a wasteful number, since it uses less digits than its factorization.

1243542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207262.

The product of its digits is 960, while the sum is 21.

The square root of 1243542 is about 1115.1421434059. The cubic root of 1243542 is about 107.5359029167.

Adding to 1243542 its reverse (2453421), we get a palindrome (3696963).

The spelling of 1243542 in words is "one million, two hundred forty-three thousand, five hundred forty-two".